Well I'm a moderator on another website, and I can tell you that once I became a mod my shitposting increased by 10000%, I think its just a multiplier of what kind of internet person you are on the inside. You'll find snobby kids being power hungry mods, you'll find contrarians being spiteful mods, you'll find people like me (shitposters) being unrestricted shitposters.
It's actually hard to find a decent mod without flaw, because it's hard to find a decent human without flaw. This is why most websites settle for what serves their best interest, and who they are willing to put up with. That or the site owner wants to have a massive chuckle.