I'm not sure where you read this but it makes sense. It is a natural transition into crowd sourcing. It will require tremendous computer power on the receiving end but is probably doable.
And my bet is no, you won't be able to turn it off, it will be a deal struck between the hardware mfg. and the government agency.
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."