"I'm traveling in my own country, a free country at that. If you're concerned that I'm carrying a bomb, feel free to search my baggage or even strip me naked and look at whatever you need to look at. But it's none of your business where I'm going and what I'm doing on the other end."

PS - I took that approach with the customs orificers who run a checkpoint WITHIN THE US BORDER in California. Refused to answer any questions about my destination or travel plans, showed them my US passport, and opened the trunk to prove it wasn't full of Mexicans -- they said I was free to go.

PPS - I encountered someone with a broken down car in a "not so nice" area of Newark, NJ pretty late at night. Stopped to help, then I saw the TSA uniform. Got back in my car, told him I didn't like people with his job, and drove off. Care to take bets whether a tow truck or a mugger found him first?

PPPS - My sentiments exactly:
http://cretincountry.blogspot.com/2010/05/i-hope-every-tsa-agent-in-country.html

Here's another story about TSA and Philly cops going through a woman's personal papers and suspecting that she was robbing her husband. Lovely:
http://articles.philly.com/2010-08-18/news/24973352_1_tsa-police-officer-checks