The other thing I've noticed is if you travel with young children they take you out of line and directly to the magnetic scanner. Not just your child and one parent but your entire family. For me it was four adult family members along with my 4yr old - no extra pat down needed.
in summary - the body scanners cannot be completely safe and they know it.
I bet when all the kids were super-excited about programming on the i386 with its "OMG VIRTUAL MEMORY!!!" the older guys who had worked on mainframes just rolled their eyes.
You talking about the same old grey beards that gasped when the kids opened the cover on a server and added their own memory, network adaptors, backplanes, disk drives, etc without having to call IBM out to do it?
The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka!" (I found it!) but "That's funny ..." -- Isaac Asimov