I always have good experiences. I shut up, take my shoes off, know whats in my bag, walk through, get my bags put my shoes on and go to the gate. No problem.
Have I been wanded, yes it was my turn for random. Went into the secondary screening area raised my arms, sat down, raised my legs, got my stuff and off to the gate. No problem, change of pace.
I give the screeners the respect any human deserves. If I get a screener with a bad attitude I don't lessen myself as do some of the whiners here. I thank them and off I go. Is it really worth arguing with someone doing their job and having a bad day? No. Do you feel better yelling at a worker? If you do then you have self esteem problems and need to look at yourself.
Wake up and realize how childish you look to other passengers around you.