Yeah, I've seen some idiots too.
At me friends range in Ardsley, NY.
About 10 years ago I was on the range right next to an NYPD officer, he was sure to tell me. He had his young son with him, maybe 8 yo. There was another guy further down the range.
We called a ceasefire, everyone stepped back, except you know who who was fiddlin' with his gun at the bench.
We finally got his attention, and we all proceeded down range to change our targets. This was at a small range with 25 yard target distance.
I and the other fellow were back at our positions but off the bench area where our guns lay, the officer was downrange with his kid. He comes back and immediately yells "range is hot!" Trouble was his kid was about 20 feet behind him.

Boy did he get ripped a new one.

my friend runs the range and said he never came back.
About 2 years ago I was in a new shop that caters mainly to LE, Blueline Tactical in Elmsford, NY Thought I'd stop in to see if anyone had traded in anything revolver..
Standing near the counter was an on-duty Capt of a local PD. He was checking out a new AR, then proceeded to sweep me with the muzzle. Well trained I suppose, eh?
I could go on and on, but you get the idea.
Maybe we should cut their arms off?