I have a few.
Two incidents from one individual, (who also did the DB move of trying to help shoot my ammo), on a cold range, picked up a pistol and loaded it up to start shooting, while shooters were downrange. A few minutes later, on a hot range, he tried to run downrange to put up a fresh target. That guy was Dee You Mmm, Dumb!
Another time, not long before fall hunting season, a shooter brought his dog to the range, to get the dog used to being around gunfire. Unleashed, and not under voice command either as the dog made a beeline downrange while it was hot.
Another time, a family came out to shoot, with a little toddler, probably 2 years old. That proceeded to run past the firing line on a hot range. That was the only time I've called a Cease Fire, and all the shooters thankfully cleared their guns in such a haste, without question or hesitation.
A Range volunteer, wanted to show off his 'race gun' he customized in his garage. had a fancy little trigger boot on the face of the trigger, that loosened up, and fell off. So he attempts to put it back on, on his super light trigger, of his loaded pistol. His ND destroyed my stapler that was on the bench.
The ironic thing is, all those incidents happened at the range that everyone here in Anchorage seems to hate because of all the rules the range has. And that they dont like when Range personnel bark at them for violating these rules. When in fact, the rules are NOT so super strict that you can't enjoy shooting.
Nowadays, if I do go to the range, i try and choose a day thats not so busy so I can enjoy my trigger therapy.