Not really irresponsible, but educating him at a young age at what a firearm is capable of, respect for the firearm, and how to properly handle the gun. If kids learn from a young age what guns can do by hands on experience it prevents accidents like the one in the original post in this thread.
I have enough firearms under my bed to supply a small African country but none of them have any rounds in the chamber. Like Adam said, I get nervous as fuck when some people start moving guns around or pointing them where they shouldn’t be and you have no idea they’re loaded or not. Most of my friends carry with a full mag and a round in the tube and always properly clear the weapon before someone else handles the gun. Even if you know a gun is unloaded ALWAYS treat it like it could go off without warning.