Spies, Eh?

Some Canadian coins found on American contractors while visiting our neighbors to the north were actually "radio frequency transmitters" (MSNBC's words). The Canadians, of course, were all "Really? That's news to us." I have to wonder what was really in the coin - a passive RFID (which is more likely to be small enough to fit in a coin, but does not have its own power source and must be very close to a reader to be tracked) or an active RFID (which still wouldn't be able to transmit over long distances). Either one would have difficulty working when embedded in a metal coin. Maybe the spy coins were plastic, and that's how they were discovered.

Of course, there's always the possibility that the Canadian government is actually spying on its citizens and these coins are merely standard issue. Canadian citizens beware! The loonies are watching you!