And I call those people idiots who should be disqualified from even being around guns in the first place. Frankly, this is one of the reasons I generally prefer to train women* to shoot guns who are interested, because they tend to start off scared of the gun. It's much easier to instill respect for what a gun can do, which makes it much easier to train them to safely handle one.
I swear, the next time some Rambo-wannabe toys around with his gun at the range and points his muzzle towards me or anyone else (whether the gun is loaded or not), I'm going to break his arm and staple the four rules of gun safety to his forehead. This is also one of the reasons I rarely go to the local range these days.
* Note that not all guys act like Rambo and some gals don't treat the gun like the dangerous weapon it actually is. This is why I have an airsoft replica of my Beretta 92FS (complete with slide and safety action; even disassembles in mostly the same way) that I use to train people in my backyard before I let them try to use the real thing at the range or an open field away from any civilization. If they can't apply the gun safety rules during practice on the airsoft, there's no way I'd let them handle my real Beretta, or any of my other firearms.