Just the occasional rerun of this anecdote. Yes you can hurt and kill without guns, of course, as our recent mass killer did (too).
We all have our moments, though hopefully most of us aren't especially likely to go on a highly pre-meditated murder spree. Still it's probably best that most of us don't have a nuclear missile launch button nearby, as occasionally we all feel rage. Also, too, it'd be best if most of us didn't have a gun nearby.