The "just doing their jobs" crap doesn't fly. If it were an honorable honest job - like, I don't know, milking cows or working on a garbage truck - then yeah, they deserve to be treated with respect. Working for TSA is not honest work. It's a dishonorable job that perpetrates a corrupt and immoral system.
People who choose to go work for TSA don't deserve respect. They are purposely inserting themselves into an immoral system - in exchange for nothing more than slightly better than fast-food wages and a secure government job - and they deserve to be reminded of that at every turn. If you think so lowly of the Constitution that you're willing to violate the rights of your fellow citizens for $30,000 (and despite what some judge somewhere may say, searching someone and presuming guilt without cause is a violation of the natural rights of human beings), then screw you, you're going to have to earn every penny when you deal with me and I will take every opportunity I can to remind you of how low and immoral a person you must obviously be.
(and, for what it's worth, as I have posted in other threads, this is why TSO's always seem to be such ignorant lower class losers - anyone with a shred of self-respect and education would see the immorality of it all and not go through with the job... so by design, they hire ignorant losers and thugs because those are the most loyal soldiers...)
If working at TSA became unpleasant enough to make people think twice about taking the job - and if enough passengers resisted against the incremental invasiveness of it all and raised hell - then TSA would eventually go away. But because so many people seem to think that being "nice" is more important than their liberty, TSA takes that as acquiescence and approval and the crap continues and expands.
An unfortunate consequence of Godwin's Law is that anyone who compares anything to Nazis nowadays is often dismissed as being overly dramatic and exaggerative, but the truth is, "just following orders" wasn't a legitimate excuse after World War II and "just doing their job" doesn't justify what TSA allows its agents to perpetrate on innocent Americans, either.