In 42 years of camping, can't remember an altercation until January of this year while camped at a Thousand Trails park in So. Cal. We were parked in a pull thru site, when late in the day in comes a DP pulling a monstrous trailer filled with 15 dirt bikes. Being retired bikers, we had no problem with the new arrivals. They pulled in the opposite way, making it a buddy site with their exhaust pipe 2 ft. from our slide out. The next morning off they went, not to be seen again for two weeks.
They returned after dark one night while we were eating supper, and fired up the diesel so they could load the bikes. The fumes begin filtering in our slide out and within 10 minutes we gave up on dinner. After 20 minutes we had to evacuate, with two dogs and a cat carrier. DH and I stood by our rig and glared at them but said nothing. After 30 minutes, DH went to a phone (no cell service) to call a Ranger (no luck). After 45 minutes, one of the men came over in my face and said, "Glaring at us won't make us go any faster. Why don't you just get in your car and go somewhere?"
Well, so much for keeping my mouth shut. I'm sure our fellow campers could hear the back-and-forth exchange. I not-so-politely told them they could have pulled off the park exit road to load up. After almost an hour of idling, they finally pulled out.
The next morning DH found a wallet belonging to one of the guys, lying in the middle of their site, with a $100 bill in it and lots of credit cards. Oh, how tempting it was to take it to San Diego and toss it on the sidewalk. We gave it to the TT manager.