Re:Well (Score 1)

"Hey, you! Yes, you! I see you have been hanging a lot with that troublemaker Smith lately! I am warning you, you better stay away from him, or you are gotta get it!"

Last I checked, Teachers already have a pretty good idea of who hangs out with who. In fact, a very good sense. Why? Teachers are there at lunch. Administrators walk around at lunch. At school events.

The one thing I could think of your point being valid is in possible drug deals, if the school noticed 2 (or more) students going to one remote place every [few] weeks/days. However, I highly doubt they'd be doing real analysis from the data collected.

Also, kids could easily block the RFID's signal with aluminum foil.