I wouldn't quite call it an altercation, but one time while at a park in our C (no toad) to visit a local air show nearby we had an 'issue' with the fella across the way.
We had headed out right after breakfast in the motorhome as we had every morning to see the air show. This day however we ended up coming back around lunchtime instead of being away the whole day since we'd met friends who were also at the show and the wives were going to go back to the park and hang by the pool while us guys were going to go to the lake nearby where the floatplanes were based.
When we got back to the park we discovered the fella from across the lane in our site waxing his B in the shade on our site.
He completely ignored me pulling up, and when I went over to ask him to move so I could park he brusquely told me to just park in his site and "bugger off" he needed to finish and it had to be done in the shade. His site was full afternoon sun. I explained I preferred my own shady site since I had dogs in the coach and declined his offer to swap sites. He said he was only half done and be finished by dinner time.
Long story short I just contacted the office who came down to ask him to move. He was equally uncooperative with them.
Within a few minutes he was heading out the front gate in his half waxed rig screaming about oppression and how I had 'gotten him' thrown out.