It's amazing the lengths some will go to in order to squirrel away a nickel.
The best I have seen lately was the couple in a new class C Dynamax Force who arrived late, took an undeveloped site using an honor system envelope near 3 different tent camping families, then thought they were going to run the onboard genny all night for the AC. This when there were dozens of electric sites unoccupied. When the gent was confronted about the noise of the genny and told about the electric sites, he even admitted he took the undeveloped site to save the additional $6.50 the electric site would have cost. Can you even run an onboard genny for 8 hours or so for an AC on $6.50 in fuel. :S
$140K new super C + squeaking for $6.50 = priceless.