I used to always request the patdown to avoid the scanners. It was a blend of concern over radiation and a protest against the corrupt process of their procurement. But, my friend said they don't use backscatter xrays anymore, and dang if it isn't a lot more convenient. So I have been going through the scanners like the rest of the sheep. I'm not sure if I won or lost that one. I could boycott flying altogether, but I'm not sure if that would be winning or losing either...
When I fly back from Japan I always get through security without realizing it. No line, no taking shoes off, no scanners except maybe metal detectors, but I don't notice..it's like being a human being again.