Have you ever been to ft hood? I have. I wouldn't let my 5 year old daughter play outside alone in the projects they call housing. There is a deeper issue here. Some of people that were allowed to join the Army after 911 are not people I would want my children around. Not all, some. I love what the military stands for; that's why I am a government DOD civilian (god knows it's not the pay). However, the lower-standards are the reason I got out of the Army after 7+ years active duty and 3 years reserves.
Now, how to mitigate... That I am not sure. One of the largest issues while I was in (till 2011) is that soldiers with mental issues were looked down upon. More awareness for PTSD and the like are a good place to start.
You want to take a controlled environment where people are put through stresses you cannot imagine and than add the issue of who is armed? Practice how you play... Make them tired, stressed, angry... Then add a gun the NCO doesn't know about all while trying to enforce a standard? Brilliant.