Hardluk... people are already scanning cards... They get a hold of the cheap, short-range Point of Sale units and wander around harvesting them. Haven't you seen the recent rash of aluminum hard case wallets being hyped in commercials, or the sudden stop to advertising of the Key-fob credit cards?
Mythbusters was going to do this "myth" and in their meeting with Texas Instruments, every lawyer for the major credit card companies was there to menace the Discovery channel out of even the thought. I placed that link earlier in this discussion.
Southern Rebel... you just made me spit-take my coffee. Congratulations.
Finally for anyone who wants to make the Govt argument about scanning peoples homes, it's already been decided that the use of an external detection device to "search" someone's home is not allowable . This use of technology was decided in Kyllo VS the US.
http://en.wikipedia.org/wiki/Kyllo_v._United_States
In the dissent, it was discussed that remotely searching someone's house without a warrant could be allowable as the technology for thermal imaging, or other methods became more commonly available to the general public.
20 years ago you could still pick up Cell phone coversations with a standard police scanner in the 900 mhz range.
Craigslist brought about the clearing of people's entire houses by another person posting to come take everything.
http://www.komonews.com/news/6888002.html
"TACOMA, Wash. - The ad on Craigslist invited people to help themselves to anything at a woman's house in Tacoma. But the woman who owns the house wasn't the one who posted the ad"
Social networks brought about the Burglar who trolls the net looking for people who post their presence away from their homes as a way to find empty targets.
http://pleaserobme.com/ (now no longer posting empty houses)
Technology evolves faster than many of us can keep abreast of. Maybe we just have a higher grade of Tweeker with all of the tech companies in the NW.