About 6 months ago, I had the explosives detector at SFO flag me as suspect after a random pat-down. What followed was a second, slightly more thorough, pat-down and a very thorough search of my carry-on. It all took about 15 minutes, and the TSA staff were nothing but friendly throughout the procedure.
Whenever you fly, keep two things in mind: 1) the TSA staff are mostly just doing their job, and 2) not all of them are assholes.
Those two arguments can be applied for practically any profession.
If you are mentioning them as offset to the issue at hand, they are no comfort to people who are subject to racial profiling/harassment (or to people who condemn such actions).
Whenever you fly, keep two things in mind: 1) the TSA staff are mostly just doing their job, and 2) not all of them are assholes.