“The responsible thing to do then is have a dozen guns and enough ammo for a dozen people.”
I’m old. I don’t get out much. I don’t know a dozen responsible people I could hand a rifle to when the balloon goes up.
I'm old too.
If you know three responsible people and each of them knows three responsible people, that would be a dozen. If word gets out that you can help, there will be a line at your door.