Why all this fuss about the body scanners? Bring them on! They should have been in place years ago. If you've got nothing to hide it's no problem. So stop complaining!
Regarding privary, as long as the person/computer screening the images does not physically see the person being scanned it's no problem.
Yes, terrorist will find another way but at least we gotta try an make life difficult for them. If only goverments could become pro-active...