Using RFID to track your every move at the airport

you know that a lot of people aren't going to like this, but the Transportation Security Administration wants to start putting RFID tags into airline boarding passes in order to keep tabs on the location fo all the passengers at an airport. The upside to the RFID tags (at least supposedly) is that it will speed the process of going through security checks for people participating in the agency's new "registered traveler" program. But on the other hand, since they can know where everyone is (and where everyone is supposed to be), it could also potentially mean that you could arouse suspicion if you spend too much time in a restroom or linger at a gate other than your own for too long.