I find it ridiculous that people get worried about how they are going to look on the "naked scanner". Just make sure that those viewing the images can't see the passengers "in the flesh" to correlate outward apprearance to their image and no-one will give a damn.
It can't be that different to security staff "eyeing up" or frisking passengers at present - and I doubt the viewers would give much of a damn about an image after they have seen the first few hundred.