Easy access is subjective; we all know people that own guns. It's my recollection that in at least two of the school shootings, trying to find weapons to use was one of the primary objectives and it took stealing them from outside of their own homes to acquire them. When you are willing to partake in something so gruesome, I doubt burglary is the biggest of your concerns. I'd be willing to bet that the [illegal] acquisition process is actually enticing and empowering for them.