Our biggest frustration is the general lack of folks' decorum. I can't complain because I don't like the color of your camper or the way you dress, but I think it is reasonable to complain if a diesel truck with a modified exhaust is left running for thirty minutes at 7:00 AM on Saturday (recent experience) or if I can hear your music and foul language clearly at 11:30 PM (all too common, unfortunately). This doesn't mean one can't have a modified exhaust, play loud music, or cuss, but just don't do it obnoxiously in open public spaces where people have the right to expect common courtesies and decency. I, like others have mentioned, feel like there has been a steady decline in courtesy and decency, and the spill over into camping is expected but sad.
* That doesn't mean I am miserable or crabby - I just am selective on where and when we camp - so I can have a wonderful time with my family.