At some point we need to realize military style rifles have no place in our non-military environment. While we can't identify and isolate every possible mentally imbalanced threat in our society, we certainly can limit those individuals access to weapons that give them the ability to do so much harm. Simply put we need to value the welfare of our children over an outdated an overly commercialized concept that every person has the right to be an individual militia and arm themselves as if they are going to war.