I once watched a European guy dump his rental Class C out, while waiting in line at one of the National parks. He pointed the drain hose AT the dump station, like he was posing for a sexy fireman's calendar, and pull the valve. $#^& everywhere. He then takes the rinse hose and runs it back and forth through the stinky slinky. For the grand finale he took the same hose and filled his fresh water tank. I was trying not to dry heave while watching.
On another note, it's amazing how many total jerks there are out there that need to go through some bizarre dumping ritual of water hoses running though windows into the bathroom, repeated filling of the black tank, and carefully watching clear sewer couplings to make sure than the tanks are running crystal clear. Followed by near surgical grade sanitation of the stinky slinky, and all related parts and pieces. All while totally oblivious to the world, and end up taking ten-fifteen minutes to do so, WITH A LINE OF OTHER CAMPERS WAITING BEHIND THEM!!!!
I guess if your that messed up that you can't just dump the darn thing and roll down the road like the rest of us, you also are self centered enough that you think the whole world revolves around you, and bring a dump station to a halt, while you perform your obsessive compulsive rituals is your right, since it is in fact, all about you, right?
Oddly enough, this whole jerkish behavior is usually done by a guy with no gloves, and in the case of the latest idiot that a half dozen of us got stuck behind, the guy wiped his hands on his shorts, then grabbed his door handles inside and out while getting into the truck, and drove off with his nasty, poop contaminated hands all over his steering wheel.