So essentialy, these poor buggers are suffering from PTSD. I am not a psychiatrist but having served in afghanistan with the canadian military i have my self seen some nasty stuff that left me a bit messed up for months (i can still barely remember how to use punctiation :) and have known brothers that will never be the same. This looks just like it. When you think about it, seeing it with your own eyes or seeing pictures of it is the same. You have a bit more detachment but not that much.
It is like police officers, fire fighters, paramedics and countless others who put them selves in harm's way to protect others.
The gung ho 20 yo rushing in to be payed to "watch porn all day" is not very different from the young boys rushing to war to kill them some taleebans(yes that is intended). Young, inexperienced, without the defence mechanisms to protect a up to then sheltered psyche.
So if that is what they are suffering from, that is how they should be treated. Now the thing is will the private companies recognise this and take appropriate actions like the government AH! did (sorry for the hysterical laugh. To their credit, some people, governmental and civilians ARE trying to make a difference).