Again, I'm not at all an expert, so I'm happy for you to correct me, but I thought the Las Vegas shooter and the Church-shooter in Charleston bought their guns legally? I thought neither of them raised red flags, and so would have been deemed 'peaceful people' until they weren't.

I'm not at all saying I have the solution to this incredibly complex problem, and I'm sure that you're aware that the US has a reputation around the world for being 'gun crazy' but I would have thought that banning all guns except single shot rifles would at least help with all the shootings and massacres. Obviously the black market would need to be stamped out, and again, it might all be too complex for the US to resolve, but I guess my overall point is that I think it's entirely practical for someone in the US to be nervous about guns, because lots of people seem to get shot. Maybe the data is wrong, but at least from a PR point of view, my half-brother and half-sister in Australia go to school without ever having to worry about a shooter. I just don't think kids in the US can say the same... it's hard not to blame the guns in that comparison.