Teach your children well. Tell your kids as soon as they are grown enough to leave the house that if they see someone with a gun to immediately run home and let you know. That if they are in a friends home and they see a gun anywhere in it, to run home and let you know. A live child is not a thing to waste on unstable gun enthusiasts.
I am reminded of this one I wrote 25 years ago in response to some crazy gun nut in a forum:
The job interviewer asked each candidate on the list what they most liked doing with their free time:
Oh I have a green house and raise orchids.
I climb cliffs.
I do some skin diving.
I like to camp and go canoeing.
I fish on weekends.
I joined the astronomy club.
I buy as many guns as I can afford and spend all my free time with my children blowing the living crap out of whatever we can find.
Who ya gonna call?
Well, outside of Texas anyway…