Thinking back over those many years of camping, mostly in USFS campgrounds, but a few commercial RV parks, I can't think of any real "altercations".
I tend to ignore stray children and dogs.
I seldom make reservations; in fact, most of the campgrounds we go to don't accept reservations.
I don't recall ever encountering noisy/obnoxious drunks.
There have been a few guys who feel the need to get up and go fishing half an hour before sun-up, but they are easy to ignore.
There were the people who pitched their tent right under our bedroom window, and set up their kitchen right next to our generator exhaust, but we just closed the window, didn't use the generator when they were cooking, and ignored them.
I refuse to allow others to spoil my camping experience.