For that matter, being at 37,000 feet for 2-4 hours times however many times you fly isn't doing you any favors from a radiation perspective either. I'm not concerned about that so much as I'm concerned about the following things: There was never any meaningful scientific review regarding the machines before they were thrust on the public During the implementation of the scanners, we were consistently lied to; they won't save any images (they do, it was a part of the TSA requirements for building the scanners even), they blur out the naughty bits for the TSA worker (they don't) The manufacturer of the scanners can be pretty directly linked to Chertoff, from where the orders for the scanners began, and the biggest bitch of all... They wouldn't have caught the asshole Christmas bomber anyway! If you're going to be completely knee-jerk reactionary about security, at least make sure that the thing you are knee-jerk implementing could have actually caught the asshole that beat you the first time. I refuse to use them on these grounds alone, but even though I know I'm going to get hit with some rads when I'm airborne, I sure as hell don't need to double down when I'm on the ground for no reason at all.