Putting Chips Into People

I find RFID technology a very mixed bag. On one hand tracking people who might be kidnapped, like they've done to a limited group in Mexico, is a pretty useful application. If Fido runs away he's easier to retrieve if he's got a chip. But on the other end of the equation, and yes this is where the paranoia sets in, what if a government mandates implantation of its citizens? It seems farfetched, but what a better way to keep track of ex-cons. And then dissidents. And then people who just don't vote like the people in charge want them to. At first, chipping humans will be will be easy. We'll start with child molesters. Whose going to argue with being able to constantly track a guy who gets his jollies with children? If you think I'm over exaggerating... maybe I am. But this is tech we really need to be careful with.
I'm not sure the payoff from this project is worth it. So what happens if the find out one of their patients hasn't made tea two days in a row? Time to send in the cavalry! This just strikes me as one of projects that sounds sufficiently high tech enough to interest people, but will yield data that could probably be interpreted in a million ways.