[adammil]

Sometimes they randomly open and close security lines between scanners and metal detectors. To avoid the hassle, I pick the lines that are obviously headed to a metal detector. When I opt out, I do it firmly but politely, and never had anyone say something except one time a TSA man said "You know this isn't dangerous radiation, right?" I just said "It doesn't matter. I'm opting out." I always take the pat-down in public and they vary a lot in quality.