To Chip or Not to Chip?

I'm not talking about our dear, departed kitty this time.  I'm talking about those tiny little rice size chips that can help find wayward pets.  Chim and I both have a microchip under our skin.  Linda made sure that we would be reunited with her just in case we ever got lost.  The chances of either one of us running away is really low, but better safe than sorry, right?  Micro-chipping pets is a good idea, but what about kids?  Parents of students from two schools in San Antonio aren't too happy about the schools new micro-chipping policy.  Students have to carry an ID card that uses radio-enabled computer chips to tell where kids are at all times.  Bathroom, hallways, classroom.. at any moment admins know exactly where the kids are.  Is this an invasion of privacy or a great idea to keep kids from skipping school?  Would you want your child chipped or do you think chips are for pets (or eating!!)