Sad, but I'm not surprised.
RV internet sites are filled with all manner of 'helpful advice' that claims to let the RV occupant get more power from the pedestal than was intended.
This 'power shortage' is the result of RV's becoming rolling pleasure palaces, with every amenity of a regular home ... including air conditioning and hot-tubs. Many parks, alas, were designed back when 30 amps of 120 was more than enough for even the largest camper.
As a result, more RV owners are opening up the pedestals and playing around.
Then there is the common assumption that GFCI trips are the fault of ... the GFCI. Folks are slow to admit that maybe there's a problem somewhere in their trailer, that the GFCI might be doing its' job.
That's probably what happened here ... someon replaced / bypassed the receptacle - and were far less caring when the time came to move on.