I can't imagine people would leave their rigs idle for long periods of time for the fun of it. There has to be a valid reason, or they just don't feel like turning it off for a few minutes only to turn it back on again. Big deal. I think in the last 10 years I've seen someone idling an RV or truck more than 10 minutes about as many times as I can count on one hand. There's lot's of stuff to complain about while camping. Lots of folks are noisy and often into the night. Lots of folks don't know how to make a fire that doesn't smoke out half the campground. Lots of folks take forever at dump stations. It's a long list. None of these are malicious or intended to aggravate anyone. They are probably oblivious to it bothering anybody. When you have a lot of different people from all walks congregating in the same CG, you realize fast that most people don't do things they way you would. That doesn't make it wrong. They could very well feel the same about something you are doing. I am certain at some point you irritated someone with something you were doing and you had no idea. It's life. And you can choose what to let bother or not you and how to react to it.