The following article suggests to me that the US are trying a new line in getting people to accept a full body X-Ray by subjecting them to a thorough groping if they decline (emphasis mine) :

Travellers at US airports who refuse to be screened via new full body scanners must undergo an extensive hand search, which include touching of the genital region and breasts.

“I’m frankly bothered by the level of these pat-downs. I’ve seen them first-hand in airports in Florida,” Republican Senator George LeMieux said during a Senate Commerce, Science and Transportation Committee hearing.

He added: “I wouldn’t want my wife to be touched in the way that these folks are being touched. I wouldn’t want to be touched that way. And I think that we have to be focused on safety, but there’s a balance.”

Mr Pistole admitted it was important to consider both safety and privacy, adding that most travellers would prefer to fly on a plane with others who were properly screened.

“I recognize the invasiveness of it. I also recognize that the threat is real. The stakes are high, and we must prevail,” Mr Pistole said.

I can imagine one or two people of a certain disposition booking their tickets now and getting their refusal speech memorised ready for the free touch and feel session!