This is one of those things where you can kinda go along with it, but then the creep factor takes over. Why not just tattoo "666" on their foreheads and be done with it?
...Northside Independent School District in San Antonio, Texas, recently issued students at two of its campuses new badges with an embedded RFID (radio-frequency identification) chip in order to track their locations.
Without the badge, a student can't access the library and cafeteria, or buy tickets to extracurricular activities. The school district has threatened to suspend, fine or involuntarily transfer students who refuse to wear them.PCWorld