Am I the only one bothered by a pet charge at RV parks?

We are responsible pet owners and always have our dog on a leash, always pick up after her and she seldom barks ( her breed is a quiet breed). We also will not stay anywhere that there is a pet charge. Our dog does not add to the owners expenses in any way. Agree they should charge for kids. Have had to clean up after them in the bathrooms, and they run wild. Should be leashed and require parents to be hanging onto the other end of the leash, just like the dogs.