PAXboy, the image generated by the computer has to be temporarily stored in order to show it. Alas all scanners seem to have the functionality to permanently store the images and allow a way to get them out of the machine onto a normal computer.
When the TSA says "that feature is not normally used", it means that they do it when "they feel like it" and don't like any democratic control on what they are doing there. What will be the result? Another bunch of unused machines at the security checkpoint?