Last week the US issued a warning to US defense contractors about Canadian coins that might contain radio frequency transmitters inside them. The transmitters could presumably be used to track the movements of the people carrying them (no hints about which coins had the transmitters).
It all sounded very odd to me. After all, if the person being spied on was staying in Canada, you'd think they might spend the coin without knowing it - which makes it, er, a little tricky to follow the person who doesn't have it anymore. And if they ended up back to the US - or in any other country, you'd think they would empty their pockets to avoid carrying around the useless coin. So you'd probably be tracking the location of the dresser in their bedroom.
I guess you might get an idea of where these defense contractors live - but that's about it. I don't think you'd be guaranteed to find out anything about where they go day-to-day over the long term.
Well - lately, the US has retracted their claim about the transmitters. There seems to be no statement affirming that the transmitters weren't there. It's all so bizarre. Perhaps the Americans were just mystified by our two-toned currency?
I would like to think someone was doing some nifty study in Canada about where our currency goes while it's in circulation: "The Wonderful Journeys of Fred the Quarter or Terry the Toonie" sort of thing.
Now that would be cool.