Then people would bash each other with swords, arrows, sticks, rocks and fists. The crossbow was once "banned" by a Pope for being a "weapon of mass destruction" but I really doubt highwaymen and bandits cared much about what popes and kings said. Conflict is not new. If law-abiding citizens are prevented from effectively defending themselves and others, they are unnecessarily vulnerable to violence. There are probably areas with high gun crime or large populations where some firearms may not appropriate to possess, but unilaterally banning firearms is unwise. Areas that have issues with gun crime need to address the problem locally, perhaps by changing laws or by increasing law enforcement; that's for them to sort out. Water usage is a serious issue in Arizona; not so in Arkansas. What is a problem in one place may not be in another.