Mobile Full Body Scanning Vans Are Being Deployed

This is interesting to me for several reasons. When I use to work at the nuclear plant, we had to wear monitors which tested the level of radiation we were exposed too. I could work for months next to a nuclear reactor and not pick up as much radiation as I did when getting one single x-ray with protection.

What are the health dangers of these things that they aren't talking about?

You are talking about vehicles that have the ability to x-ray through another vehicle now you have to ask just how powerful these things are on the human body? When you think about this, you are talking about x-raying people WITHOUT any sort of protection at all!