Most here would not ignore someone using your site for a dog poop, or washing RV in a dump station line while others waited and waited? I would think that stuff would not be ignored. And some training or feedback would happen.
I have not seen either problems above, but have seen a lot of people cutting through other campsites. Some campgrounds even are laid out in a way that seems to encourage it. Nice campground (highly recommended) Usery Mountain in AZ, but restroom trail could be accessed through my site and had steady parade walking through. Pretty hard to train people if the campground layout almost requires it. I do think that is an area which could be emphasized.
Anyway enjoy the good about it and that beer!