I'm not a Big Brother fan, but how much privacy does a grade-schooler need? I'd rather be able to track him down if some maniac grabbed him. As a new father (my son is 2 months old)I could not imagine what I would do if he got snatched. Even if we got him back, I would most likely go to jail because I would kill the guy with my bare hands. No question.
Placing a RFID chip on YOUR child should be YOUR decision, not the decision of some sub-government agency?
Strangers MIGHT be maniacs, school officials ARE maniacs.
Today it's your kids, tomorrow it will be you.