You can’t really kill most ideas (it seems especially not the bad ones), they just lay dormant for a while, maybe change shape a little, maybe change location, but they come back. Many things in life are cyclical, just like fashion trends coming back in style so do ideas, and unfortunately those are usually not limited by nostalgia.

Unfortunately, even if it did “never come back” we can’t verify that “never” until the sun explodes (assuming that kills all the humans, if we get off planet before that all bets are off) as “never” can only truly be known retroactively.

And tbh, if we did have that utopian world devoid of fascism (all authoritarianism, really) and crime for eternity, guns wouldn’t be an issue anymore anyway to necessitate a ban, at that point fuck it, have fun!