\> grab a linux laptop with NFC device, amped-up for long-distance use \> sit outside a starbucks \> sit back and watch all the tap-data get stored on your HDD. I'm sure it's more complicated than that. Maybe you could even find a way to pick-up on key-presses on the dial-pads, to get PINs as well. All of a sudden, a bunch of local people decide *now* is the time to drop all their cash on bitcoin.