Comment Re:time to buy (Score 4, Informative) 235
For the curious, it takes approximately 4 layers of aluminum foil to block a scanner from activating the RFID signal when your Al lined wallet is point blank from a standard scanner.
(After receiving an RFID enabled ID card here in the Netherlands last year, I tested it on our office copy/scanner RFID reader, and then simply lined my wallet with double the number of layers it took to block the signal. Works like a charm!)