Beginning next year, U.S. passports will include an RFID chip that allows customs to grab your personal information more effeciently. It also, theoretically, could allow hackers, foreign governments, right-wing nut job politicians, and other assorted “evil doers” to siliently grab your personal information and track your every move.
So how do you disable this “feature”? Grab a hammer and pound that sucker senseless. Wired magazine has more info on this topic.