Nope, never been harassed by the park ranger or the camp host but then I do read up on all of the park rules before visiting most campgrounds. I do find a bunch of the rules stupid, some just plain common sense, and some are put in place to cover the parks a*$ against frivolous lawsuits. Thank the people that won't take responsibility for their actions and greedy ambulance chaser lawyers for many of the rules.
Example of a stupid rule: As of 2013 you can no longer hang a hummingbird feeder at your campsite at a USDA Forest Service Campground in AZ. Our camp host (great couple that ran this campground) let us leave ours out because he felt it was a stupid rule also...in fact he had a feeder out at his site. This rule wasn't posted on the website or in the pamphlet at the campground. I prefer to boondock anyway, don't care for neighbors or rules, if I wanted to deal with all that I would stay home and form a neighborhood HOA..Lol.