Really if you're just polite and treat the dumbass TSA guys like they're people (believe it or not they are) they tend not to screw with you.
Which is fine, but then these idiots need to remember the same thing. The passengers are just people as well. I mean realistically, how many millions of people go through the worlds airports every day? And how many of these people are then stopped and subsequently proven to be terrorists en-route to their 77 virgins? Negligible numbers, if any. Thats the thing that grates the most. The massive, MASSIVE majority of people are being treated like $hit for what?