We have a basic (non RFID, non magnet etc) cat flap.
If an interloper cat is deranged enough to enter
One (or more) of the resident cats will either have their wicked way with the interloper* and / or rip it to shreds.
.. Not 100% perfect - we did accidentally acquire an extra female cat as alpha male took a shine to her and so other cats were not allowed to hassle her (she became de facto alpha female) and she ended up moving in as she preferred the conditions at our place! .. but at least that system reaches a happy equilibrium.
Re: loose flaps
If an interloper cat is deranged enough to enter One (or more) of the resident cats will either have their wicked way with the interloper* and / or rip it to shreds.
Sadly, our two males are getting too old for this. However, since Junior Female has reached the age of 1, intrusions by strange cats has decreased noticably..
 Senior male cat was never too interested in fighting - he made friends with every cat around and simply couldn't be bothered. Junior male (the ginger of very little brain) saw what bosscat was doing and did likewise. Away from the house however, he was perfectly up for a scrap. But he too is getting a bit old for that.
 We have a neighbour who has a number of cats, including an intact male that she neglected to neuter. Since un-neutered males are the top of the cat social ladder, our neutered males won't stand up to him. However, female cats generally don't worry about male social standing and so our senior and junior female cats are both prepared to shred him whenever they see him.
 Said un-neutered male has decided to become a stray. As I've said before, cats simply won't stay somewhere where they are not happy (or at least, not if given the option to leave).
 Oddly, both black cats. Senior is 7.5kg, junior (being only a year old) is 2.5kg. But still prepared to lay down the law if required.
'One day he'll give up and take a dump on my pillow instead'
One of our cats (the autistic calico one) will use the usual location of the cat tray whether it's there or not. And (if it's not) will still scrape at the carpet, trying in vain to cover over what she's just.. deposited.
We tried putting a plastic cover there permanently so that at least the stuff would stay on the plastic until we could clean it up but her claws are sharp enough to penetrate most flexible plastics and so the liquids just ended up seeping through un-noticed.
 Every so often we take it away to give it a good clean. As in 'boiling water with detergent' cleaning, followed by rinsing with lots of fresh water. And, of course, that seems to be the time that her digestive system really, really has to lighten itself..
 Even using good wood-pellet cat litter, the urine smell builds up over time. And she won't use the tray if it smells of anything other than wood-pellet cat litter and cat waste.
 See above. We tried bleach - she refused to use the tray (and we had to replace it). We tried the various things like nilodour that claim to take away smells - she won't use the tray. The above is the only thing that will both clean the tray and ensure that she uses it afterwards.
 Her siblings went o other people - one of whom came cabk to us to say that they wouldn't use the cat trays. We gave them some of the wood pellet cat litter and the cats started to use the tray properly. So that whole brood may be somewhat autistic. Our *hates* change - even moving her favourite bed slightly will mean she won't use it. And, when she wants to go out, she insists on *me* opening the cat door - if my wife tries, the cat won't go out.
 Another of her oddities - she'll come *in* the cat door, but refuses to go out unless I open it for her.
 She did use it of her own accord one - but that was because she was being chased by an interloper male cat. Who was being chased by our dog..
Re: 'One day he'll give up and take a dump on my pillow instead'
The briefly seen post office cat in Pterry's "Making Money" comes to mind, whose habits don't take account of objects being displaced. I don't recall this in his "The Unadulterated Cat" so it must refer to a later observation, or, er, it wasn't the cat doing it?
For those with sufficiently low dignity that they will consent to being "chipped" like a pet
I recommend that you still carry an old card with you and appear to wave it over the sensor on the entrance door, even when it's actually detecting the chip in your hand.
That way, if anyone wishes to gain unauthorised access, they will rob you of the card, rather than your hand.
Chips are so 20th century
We have facial recognition, eye evaluation, and multiple other biometric mechanisms. Why would anyone bother with implant of a chip other than secretive covert operation spy (movie stuff) for live satellite tracking.
Your phone is like an appendage (a dirty filthy appendage) with a chip or 3 already installed. Better yet... you never leave home without it! This is a win for so many... sign at the dotted line.
Re: Chips are so 20th century
We have facial recognition ? That is 100% reliable ? I think not. They are endlessly trying to make it work in airports, but we're not there yet.
Eye evaluation ? Do you work in a Level 4 bio lab ? Has anyone ever seen those outside of Hollywood films ? In theory they're great. In practice, they're nowhere.
Multiple other biometric mechanisms ? Really ? Which ones are actually used in your fictional universe ?
Please do realize that you are taking your documentation from the Science-Fiction section of the library.
Everything old is new again
Regarding Dabbsy's likely preferred location for an implant, I can reveal that decades ago I worked at a company with contactless card readers for entry through the back door, outside of which were other vital facilities. Since the staff were mostly male, and the card reader was at just the right height for a back pocket, the Bum Bump Dance was far and away the most popular way of re-entering hell after a short stay in ablutionist heaven.
Enter at rear
There's a reddit post from a security tester showing how to beat entry locks.
1. Find door outside which smokers congregate.
2. Create suitable incident to get somebody outside (like setting off a car alarm).
3. Pretending to be talking animatedly on cell phone, wait for door to open and dash inside.
After that, it's "adopt local color, make like a maint. guy etc." Infallible.
Oh dear. WAKE UP PEOPLE.
Nice to see so many people taking the latest threat to our civil liberties by the globalists ever so seriously.
Refuse these damn things. Or do you want to be tracked like a chipped animal for the rest of your life?
Perhaps the globalist cabal should get chipped themselves, get their babies vaccinated multiple times, eat genetically modified food and drink fluoridated water every day? Breathe in the same crap and be subjected to the same plastic infested rubbish we end up ingesting.
Stop experimenting on us, experiment on your 1% useless worthless murdering selves.
Leave the rest of us 99% alone.
To those of you sniggering at me - don't bother calling me a tin foil hat conspiracist, stick to being docile sheep. Just as the globalists want you. Keep watching the trash on TV. Consume. Comply. Stay dumb.
Let the rest of us stay awake to this. Anyone else awake, let's keep up the struggle against this evil.
Re: Oh dear. WAKE UP PEOPLE.
The whole point is to resist before it reaches critical mass.
Once it becomes mainstream, it will be much harder to turn it down. You will have a choice of having a job and being chipped, or being unemployed, because you have very few options left unless you have a chip.
It's the same with smart meters.
Best to fight it whilst it's a minority feature within employers.
Otherwise, it will be too late.
Parse the word
Chips are just like finger print passwords you can only change them so many times either through lack of options [ten digits] or by continually mutilating the employees to replace the chips. The other problem is a memorised [or not] password isn't open to others just randomly scanning either your chip or the fingerprints so openly left on all objects you touch..
As for Cats mine consistently attempts to open the fish food and eat it.........and just as consistently regurgitates it up on the carpet
Have trained us humans to care for them pretty nicely.
The cat I had before I had the cat flappy door would jump on my bed then wander over to the sliding glass door and await my opening of it. The clawing of the screen door was the signal to be let back in. I was perfectly trained.
I worked for a large organisation which I will not mention, but they had a very sophisticated RFID tag based security system that required you to tap-in as you moved around the campus and there were tag-operated self-opening/closing security gates at all of the perimeter
It was an extremely comprehensive system that met all of the latest technical requirements for system-security but had one massive flaw; other than these gates, the campus was surrounded by a wall that you could simply step over!!
Open doors first time with this one trick
I've said before, I think, that my external experience of these things, mainly in a building that's been demolished so I am not bang up to date, supports a belief that a fixed transmitter has to ping, the portable key bit has to pong, the transaction has to be completed while the ponger is extremely close to the pinger and they don't show you where the pinger is or when it is pinging. So...
One device - a time clock - required a disc glued to a stripeless card to be held to a particular spot on the clock for 1 full second. So that's what I did, but I glued the disc to my phone and photographed the time clock as well, afterwards, so that I could tell I'd done it - there was nothing to stop me forgetting.
On another, for doors - same building - I converted the keyring tag thing into a finger ring, by cutting off the rim of a bottle top I think then securely taping that to the tag bit. Then the technique was to walk towards the door while sweeping the ring hand at just the right speed past the pinger so that a ping happened somewhere within range and it unlocked the door, usually, before I walked into it.
Faulure is extremely valuable
In political and corporate circles.,
How many of El Reg's Remoaner readership would be actually pleased if Theresa May had actually delivered on her rhetoric or even the job description
"Leave Mean Leave."
"I will reduce immigration."
Sometimes you need a bloody minded thick skinned lying two face incompetent failure to urinate all over democracy to make sure that your pensions, careers, and profits are safe.
£39bn buys a LOT of politicians and media tarts.