[justin66]

> Every time people complain about the TSA and are asked how they should do security people say they should evaluate the person - look for signs of nervousness and things like that.

Putting aside the obvious falsehood ("every time") there's obviously a little critical analysis required to differentiate between people who are nervous because they don't like getting airplanes, people who are nervous because they're about to miss their flight, people who are just generally anxious, and people who are nervous because they're about to blow up an airplane.