The public doesn't know very much about these scanners. There are only one or two public images allegedly taken in a scanner, but not with the “arms in the air” pose required for actual air travelers.

To correct this, in every airport a collection of volunteers who don’t mind people seeing them “xray-naked” should be sent through the scanner, just like normal operation, and the pictures should be displayed next to the security line so everyone in line can make up their own mind if they want to be scanned or would prefer to opt out for manual screening.