The Internet of Things will save us all!
I wonder what's going to happen when everyone's furnace, toaster, refrigerator and lights are connected to the Internet.
Stuff like this is crazy. I don't work in automation, but i do work in an environment that requires a network with no Internet access for some key functions. Part of the reason for this is that, like the SCADA gear everyone's talking about, we deal with wacky proprietary crap that absolutely fails to work when you start turning even basic Windows security on. The crap vendors won't (or can't in some cases) fix the problem - most of them are either the only supplier or one of two in the world. The problem is that all the stuff you can't secure *needs* to be air gapped. It's a major pain to deal with and requires nasty workarounds like sneakernetting files around, but it has to be done. This goes doubly so for us because some of these devices are actual end user machines with people sitting in front of them.
Everyone forgets that these Internet-connected devices, even though they communicate through standard protocols, have that server software implementing the protocols sitting somewhere. In the case of IoT things, that could be a cheap system-on-chip, or a Windows 2000 Server SP3 embedded computer with no upgrade capability.