I live in the UK. A number of my friends have either been hassled by the TSA, or have expressed reluctance to travel to the USA because of them. Anecdotal, I admit.
I'm a US citizen but currently live in the UK. I'm more interrogated going back to the US than I am any other country. (And that list includes everything from Ireland to the Ukraine.)
Personally I don't think citizens should be made to feel that way by their own border police!
I've had the same experiences (although I live in the US also). At some point, I have to wonder what happens if I say "no further questions" and just walk through the customs area. Are they going to deport me ... back to where I am?