[teacherwoes]

This is really stretching a point. First of all consider how many receivers you would need to install to just track someone going about their daily business. Second, you have to assume the transmitter is always turned on. Third you need to assume the person only wears these shoes and no others.

Fourth, you need to figure out that a person has nothing better to do than to stand within 60 feet of an intended target all day long

[Frapster]

And if they're running you can count me out!