To ask what is wrong with the advertisment is a leading question. And to the one who posted that children have no parential supervision, there are those who say kids don't do anything but sit in their room.
There was another advertisment, this one for Savage automatic pistols (ten shots quick, endorsed by Wyatt Earp), that says to fire the first shot out the window. But I guess that would get someone's attention, which was the idea.
I don't believe all kids used to carry guns. That's an example of revisionist history. Besides, New Yorkers believe everyone down here carries guns to school. How they could afford them is beyond me. I couldn't have at that age but $6 wasn't much, even then. But there was a huge difference between 1910 and 1920 in terms of prices, no doubt similiar to between 1940 and 1946.
Iver Johnson revolvers used to really advertise their safety feature, especially the "hammer the hammer" thing. I've had a couple of S&W revolvers that looked like someone tried that. They made a large variety but they were all small calibers. People didn't realize that all those old calibers wouldn't harm a flea, did they? There were lots of other small revolvers, a lot of which were break-tops. The cylinders on some didn't even lock up but I guess enough people didn't mind. I didn't however, realize the Iver Johnson had a lever in the trigger like a Glock, though at least one automatic pistol from the WWI period did, and I think it was Austrian, maybe Hungarian.