Maybe, but at least all ten entries are on the same page.
There are only two "stupid things" in the adds, leaving the revolver with a child, and hammering the hammer. Both are extreme examples meant to illustrate safety features from an age when advertisers expected an intelligent audience that would not immediately go out and ape what they saw, and would take a modicum of responsibility for their own safety. And if they didn't, no one would be at fault except the stupid responsible party themselves.
Look at his other posts.