The entire premise of this is wrong. Research has shown that the majority of Americans favor allowing the government to take naked pictures of them, even if it doesn't result in extra safety. Jeffrey Rosen wrote an entire book about this called The Naked Crowd:

http://www.amazon.com/Naked-Crowd-Reclaiming-Security-Freedo...

"People really need to start calling these things what they are: electronic strip search machines."

That will never happen. Given the choice between two methods of searches, both of which have equal safety outcomes, people prefer the strip search over the non-invasive one.

Jeffrey Rosen wrote an entire book about this phenomenon; the book is The Naked Crowd. You can read the story, which is on page 1 of the book, via the Amazon sample:

http://www.amazon.com/Naked-Crowd-Reclaiming-Security-Freedo...