That's why my mother drilled into me the first rule of firearm safety. Always presume the weapon is loaded then check and clear before handling. I was taught firearm safety before anything really. Back then it was a different time and guns were everywhere.
I think this is part of the solution, but people who are around guns all the time, and use them regularly have NDs all the time. How many stories have we heard of beat cops blowing a hole in their hand because they were taking down their Glocks for cleaning? I know it doesn't seem obvious, but there are far more guns per capita in the hands of the public than there were in the 1960's, and more individuals owning guns - particularly handguns, and so intuitively, I'd expect there would be more cases of people experiencing what I'd call 'operational' NDs and other events like Quantavious fooling with a gun on TikTok and blowing his brains out.
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I think first time buyers should be required to take a in depth firearms safety course. If that ruffles some feathers then so be it but there are entirely to many idiots with guns out there.
I understand where people are coming from when this kind of suggestion is made, but frankly, beyond being told "don't touch that curved thing unless you want the gun to go bang' and 'don't point it at people', I'm not sure that mandatory "safety" training really adds much value, and it's just one more barrier to people exercising their 2A rights. Highly trained people experience NDs and break safety rules from time to time too.
Edit: And I say this as a qualified NRA Instructor.

