Obviously the workaround is to stay away from Fisherman's Wharf. Zipping past Fisherman's Wharf, Chris Paget's scanner downloaded to his laptop the unique serial numbers of two pedestrians' electronic U.S. passport cards embedded with radio frequency identification, or RFID, tags. Within an hour, he'd "skimmed" four more of the new, microchipped PASS cards from a distance of 20 feet. "There's a reason you don't wear your Social Security number across your T-shirt," Albrecht says, "and beam