It would be a change of nature. The only argument I understand about it is can you by law organize rarefaction enough to reduce opportunity gun related violence? I just don't know but one thing you can be sure of is it won't stop the random killing man on a mission as many events of that type has proved that these guys have planned their rampage and u may succeed at making their life a little more complicated but ultimately... Colorado's flat was full of chemicals and despite surveillance of certain sales well...Norway has very strict gun laws, it didn't stop the guy and French laws didn't do any better. Gun free zones have only one effect as far as I know, reduce drastically crime and law violations reporting in fear of retaliation. Learning and understand what trigger these events may help at trying to prevent them but even if you don't like it the NRA argument that schools should be protected make sense. How do you want by law control mental heath in a free society....? I m listening.