Ok after having read through this entire thread, I would have to agree that cutting through a site, loud kids/adults, pets running rampant, and the other peeves mentioned are all worthy of note.
However, I have one I would like to add to the list. My pet peeve is bathrooms...dirty, nasty, eewww bathrooms!!
I'm no germaphobe, but some of the bathrooms you run across are so filthy you are afraid of catching something from just looking at it!
If I ever had an rv park or managed one, the bathrooms in it would be one of my primary concerns. There's nothing that says "We Care" more than clean restroom and shower facilities!