Yeah, you meet all kinds at the public ranges.
Most of my "Bad" experiences regarding safety has been At Twin Ponds.
I was taking aim when I heard a commotion on the right side of the line, where the sidewalk is, so I slacked up on the trigger and took a look. I saw a guy, wearing an EMS jacket no less, walking down the path to setup his target while firing was going on on the left of the line. I growled "CEASE FIRE!" like a drill Sergeant for the first time in my life and the shooting stopped (amazing how that works). We started to berate the guy for walking in front of the line and he looked at us like we were the stupid ones. "I wasn't going over where they were shooting, I was just going over here to the right to setup my target." Later this same guy uprooted my targets and started moving them over to his side of the range. Needless to say, he thought the targets were provided by the county and you could shoot anything you saw out there.
Another experience was when a group of about 15 teenagers and young adults came to the range with a few handguns.The range was packed that day and their crowd just made it worse. They took turns shooting but had a bad habit of slowly stepping back from the line after handing the weapon to the next shooter. Some were 6' to 8' feet behind the line, with people at the next table literally a mere 3 feet to their right and unaware of them being so far back while they shot. I stepped over to them, got their attention, and walked them back up to the line where it was safer. They were polite, but three shooters later, back behind the line they stood shooting again. This time another person told them to step up, which they did. Yet again, they started stepping back off the line, handing off the pistol, and not stepping up to start shooting. I gave up at that point and started packed my stuff. My wife asked me why we were leaving since we had just gotten there and its a 40 mile trip to get there. In a loud voice so as to be overheard over the din of firing, I said, "Because I did not come here to see someone get shot".
It is because of this second incident that I now have a homemade trauma kit in my car trunk when I go shooting. Its not much; a few maxi pads, latex gloves, and an ace bandage, but Ifigure it will give me something to do besides watch someone bleed out in front of me. (If you see me with Kotex Maxi pads, now you know why, so don't laugh).