When is ad-blocking ethical?
100% of the time IMO as I dont want dross I'll never buy shoved in my face - if I go to a site that wants me to switch off Adblock, it gets dumped immediately.
Sites excersice little control over who ultimately uses their advertising space, the BBC et all spewing malware in the form of ransomeware being a typical example.
So they can all Foxtrott Oscar.
Biting the hand that feeds IT
