What you guys are missing is that these Bubbas don't know squat about etiquette at a range, and that strongly indicates that they don't know much about the safety rules either. I sure would have called 'em on it as I'm getting old and very grumpy.
I use a public range where there can be problems, like the one I had about two weeks ago. I was setting up to shoot and there was one other guy, just arrived, setting up his stuff as well. There was an older, Vietnam vet that's well known on the range who was sweeping and cleaning the concrete behind us.
The guy setting up was older, probably in his sixties. All of a sudden, in the middle of setting up---without calling 'RANGE HOT' or any other warning, he picks up a .45 and starts cranking rounds downrange. I didn't have my ears on and neither did the vet. We grabbed our ears and as soon as the firing stopped, the vet started yelling at the guy 'what the hell were you thinking? No 'Range Hot', no 'Got your ears on'?..' he really lit into the guy and I added my two cents worth in.
The guy started yelling back about how he'd been coming to the range for over thirty years; how we were idiots for not always having our ears on; and who do we think we are talking to an armed man like that?
He packed up and left in a huff, but it goes to show you just never know what you're going to encounter. It's also the reason that long ago, I adopted the custom of always keeping a loaded sidearm on me at the range, at all times.