Earlier quoted context omitted.
While I don't know exactly what the poster you were responding to meant, it's possible that rather than meaning: "I think it's possible someone carrying may choose to intentionally shoot a child at any moment." he meant: "I think that (a) accidents happen in general and (b) should a specific crisis situation emerge and someone carrying uses their gun to respond, they are likely enough to shoot an innocent bystander a…
Yeah, that's what I thought he probably meant, too -- that someone trying to shoot at a threat would miss and hit a child. That's what triggered me saying, "you must not know much about guns." You're welcome to your own judgement call on that, of course, but to me that's really unrealistic. One of the places I went shooting was a weekly practical skills tournament. Everything we shot at moved or popped up or had some…
They do happen, last I can remember was a worst case where an armed citizen tried to slip out of a pizza joint during a robbery only to find the robbers had locked the door behind them. They noticed and started shooting at him, and one or more of the staff were behind them in line with the citizen. Bad situation, but then again, for all we know he saved the lives of everyone in the joint, based on the criminals' actions.