We all need to take personal responsibility for our actions and their consequences. If we displace that responsibility into someone's hands, we are not being responsible and not taking things seriously enough. When people consider it their responsibility to keep the neighborhood clean and streets safe for everyone it would also lead them to be hostile against aggression knowing full well that as long as they don't start the mess, they can end the mess and sufferer no legal consequences.

People can take care of themselves and law should allow themselves to do that.