Brendan Walker, a 37-year-old software engineer in Canton, Ohio, is one of a growing number of computer and technology experts who are becoming anxious about possible abuses of the technology. Mr. Walker fears that thieves will be able to eavesdrop on the radio transmission and buy gas at his expense. He also figures that he himself could walk past the pump and accidentally pay for somebody else's gas, though the card companies say he would have to get within two inches of the scanner to accomplish that feat.
RFID: Legitimate fear or fear-mongering? by ZDNet's Mitch Ratcliffe -- A Wall Street Journal article details the exploits of RFID-defeating privacy advocates and a few snake-oil solutions.