"Most people are unaware about the fact that there is significant radiation exposure associated with air travel because they are well above the Earth's atmosphere," said Robert J. Barish, a radiological and health physicist in New York City. "You'd get as much radiation in a whole-body scanner as you'd get in two minutes at 30,000 feet."Of course, if you'd never wear a bathing suit in public, you may have concerns not related to the health impact of being scanned. But then you'd probably be Amish, so that would be moot.
The steady erosion of any privacy at all - and what if anything to do about it - is another question altogether.