People who don't listen to anything you tell them at all insisting that spending more money is the way to do it and they also happen to be a mod and then go on a ban-spree for being told their wrong
or...
mods who ban people because the mod is an idiot in the first place and gets corrected in a polite manner, and decides to take it as a personal insult, to justify a ban
in other words, mods and admins who take bbs too seriously and act like it's some sort of lifeline
That's it, you're banned.