“If they find it, they will play with it. Always lock up your guns.” 
Totally not what I was expecting.
That was very good.
That was good - an ingenious and light-hearted way to get that life-or-death message across.
Holy shit, that’s funny. Too bad it’ll never get run on tv, though.
Let’s go to the quarry and throw stuff down there! That totally fucking rocked!
FTW
No.
I find the messaging to be inadequate, and possibly misleading. Guns were ubiquitous when I was growing up, and also as I raised my children. I taught them to respect them, as they would any dangerous tool, like a tablesaw. By introducing them to them early, and removing ALL of the mystery, and showing them first-hand how dangerous and damaging they could be (by taking them to a shooting range, letting them shoot them, and showing them the damage they cause to melons, etc.), they never had an inclination to want to “play” with them.
The issue here is percentages. YOUR children no doubt had the discipline and maturity never to do anything stupid with guns, once properly instructed, at any age. However, I would hesitate to extrapolate this to ALL children, everywhere, regardless of age. The course of safety for the public in general is to remove the temptation by removing “ubiquitous” access to guns until the child is relatively mature.
This just strikes me as common sense - I would not give my six year old access to dangerous tools like a table-saw, either. Kids that age may “know” in abstract that such things are not toys, but nonetheless be tempted into stupidity.
Might I suggest that, until you are assigned to teach all children about gun safety, such messages be allowed to run for the sake of all the other families out there?
The PSA is not inconsistent with what you are saying. Certainly you didn’t expose children to firearms at an early age unsupervised - you taught them. You teach them in a controlled environment, not one where they discover them on their own without the benefit of that teaching. You wouldn’t let an unfamiliar child around a plugged in table saw alone in your garage.
Kids play with shit they are not supposed to all the time. Reminding people of that may be helpful, or amusing, or both. It certainly doesn’t hurt.