Here's the best libertarian gun control alternative yet:
I'd also like us to encourage people to gang rush shooters, rather than following their instincts to hide; if we drilled it into young people that the correct thing to do is for everyone to instantly run at the guy with the gun, these sorts of mass shootings would be less deadly, because even a guy with a very powerful weapon can be brought down by 8-12 unarmed bodies piling on him at once.
Thank you, Ms McArdle. Offhand, one institution I can think of that drilled it's mostly young members to march or run straight into gunfire was the British army of the 18th century. And as I recall , the monolithic discipline of the redcoats and the savage punishments designed to enforce it were major propaganda points for the US side in the Revolutionary War, contrasting as they did with the individual spirit of free Americans. Historical full circle, I guess.
IMMEDIATE UPDATE: actually, I can think of an occasion when a bunch of people rushed a man threatening them with a gun. It was in Clynes wine bar in Hulme about twenty years ago. But the people concerned were a) middle aged, mainly b) local hard men c) drunk and d) preceeded by an artillery barrage in the form of glasses, ashtrays, bottles, chairs etc. Perhaps we could export lairy Mancunian drunks in bunches for overwatch duties in American primary schools.