Here's my issue. i can usually zip right through security fairly quickly. I put anything that beeps (only my watch) into my bag, rarely carry a laptop, the iPad stays in my man-bag and I hit the line prepared. If someone wants to "Fight the Power" puleeeeeeze sate that need outside of the peak times because some of us are just trying to get to work.
Or go home, for that matter.
"Yes, I get it, I know this sucks, but this isn't where you're going to make any meaningful changes, and, as a matter of fact, you'll probably find yourself in deep umgawa with the Federales if you try to make any changes here, so shut up, grin, and get your daily grope."
I dislike the advanced/full body imagers, and actually think they don't pass the Constitutional sniff test for reasonableness when it comes to administrative searches (and let's not even talk about the "thorough pat-down" alternative...), but I'm not about to stage a protest in line, especially when I have a badge around my neck that says who I am and who I work for. And I've gotten pretty good about getting stuff disassembled and out for inspection (shoes off, belt off, stuff in man-bag, laptop out, liquids out when required, etc. etc. etc.).
I don't like it, but there are appropriate venues for protest. And hating on a TSO isn't an appropriate way (it's probably the most inappropriate way) to express your outrage either.
Lastly, the legality and appropriateness of some sort of security screening to board an airliner has been long established and that's very unlikely to change, even if I wish to see changes in the methods of screening to make them simultaneously more effective and less inconvenient.