People!
Keep in mind that these devices are not designed to hold an image for very long. Especially long enough to DL images to a USB key.
Female operators are supposed to scan women, Men scans men, etc. Er... no children to scan children.
The quality of the "nudity" is pretty weak... its mostly fuzzy B&W ghost look with objects that show up that you can't see.
But it still creates a security hole... a terrorist can simply load up the kid with whatever illegal/bomb hardware. But of course, if its anything metal or chemical - the usual detectors should pick those up.