Our public range is pretty quiet, with most (not all) shooters respectful and careful. No range officers, just a small town public range a couple miles out of town. If it looks too busy, I go home and try again later. The only really negative interaction I've had was with a fellow who hung out there to collect the brass others left. Mostly he did a service, I'd say. He wasn't shooting, just hanging out with a pair of earplugs in, drinking coffee. I asked if it was ok to shoot, wanted him to know the range was hot, and after ejecting an empty, it rolled off the concrete table. He made a beeline for it and grabbed it from the floor right next to my bench. I said hey, that's mine,, and he told me if brass hits the floor it is his. I took the bolt out of my rifle (didn't want any misunderstandings of how far I'd go for a piece of brass) and told him that till I left, my brass was mine. Must have looked serious as he handed me my brass and quit circling my bench like a vulture. It was first time reloaded Nosler brass....wasn't going to give it to a brass hound!
