Place accountability for massacres where it is due.

Guns are not the blame. Neither is music, video games, wearing lots of black, tattoos, pop culture, entertainment, autism, being introverted, lack of religion, or any of the above. Take away guns, and people will build their own bombs or use bladed weapons or baseball bats (either of which account for more deaths than guns). And arts and entertainment as a whole are only a reflection of society, not its maker. To be driven to something like this, someone would have to feel isolated and desperate. Probably abused and/or bullied, and nowhere to turn to. Address the REAL problem, and this will happen less. Don't put it on the same old scapegoats!