What is your definition of a corrupted GM/server?
A GM that gives his character some items?
Or a GM that bans his enemies?
A GM that choose a specific team and give them advantages?
A server that tries to push players to donate to his server for a great dedicated server, even though it has average 10 players online/day?
Would I be a corrupted GM if I pass some free items once in a while for new low level players, in hope that they will stay and perhaps recruit more friends?
Would I be a corrupted GM if I pass equipments equally among guilds who are in war against each other, to test it out/balance purposes?
Would I be a corrupt GM if I give myself items, so I can test and balance vocations out myself?
Would I have a corrupt server, because there are someone who died in game, without me helping them/give them advantages? Since this case usually ends up with those sad players entering forums to complain.
Happy people does very rarely come with positive feedback on a server.
However, sad people does very often come with negative feedback on a server.
Because happy players are satisfied with the server, and therefore play it instead of registering to bothersome forums.