Double down on the training. Idiots with guns will add to the problem. You have to respect the power of the weapon to be an effective deterrent.
Only one gun required per family unit (gotta have one parent who is not carrying to deal with the kids).
Mandatory training for kids over 5 and again at over 10 just to help them avoid the danger of mishandling the weapon.
If we are reverting back to the wild west, I guess we will need to rearm the masses.