When I travel I opt out of the scanner every time, ask the pat-down guy what happens if he finds drugs on me, and sometimes refuse the search by asking them if I'm under arrest ('if not, am I free to go?').
If the TSA agent won't let me leave without a search, I demand they call the cops, who are obligated to let me leave (not enter the airport, though) because I haven't committed a crime.
One time in SFO they called the bomb squad because I tested positive for fertilizer (or something) and I still went through all this. I refused something called a 'private room crotch rub', which I regret a little.
When I talk to friends who are any shade of brown they tell me 'you should have had your ass handed to you'.