The possibility of getting shot has broadly convinced the general public to improve their own behavior.
Pure nonsense. That is just regurgitating NRA propaganda, "an armed society is a polite society", when we know for objective fact that the opposite is true. Gun incidents happen more frequently in the US on a "spur of the moment" thing exactly because they are so prevalent. Arguments more frequently escalate into murder because of the presence of guns, while they don't in societies where guns are rarer.