We had a bozo show up at a 30amp site late Friday evening, break out a screwdriver and proceed to rewire a shared between 2 sites pedestal to power his 50amp 5er. In the process he somehow back fed something into our trailer and the other 4 or 5 people between him and us, we were on the end of the circuit. We lost the microwave and fridge but everything else survived. More than likely because it was only for a split second before his pedestal modification shut down the entire loop for 1/2 an hour, before the state park maintenance people could get there and figure out what the hell happened. This was the first trip with a new trailer before I got around to installing the Progressive Industries hardwired EMS.....its the best thing you can add to your rig.
It cost me about $250 and who knows about the other 4 or 5 people. All the amatuer electrician received was a $105 citation.