Ironically, you can be banned for stuff you say in guild chat too. The relative privacy of the channel is no safeguard.
EDIT: The real trolls in that thread are people who are responding to him, not the OP. Back in the good old days, if someone said something dumb, people ignored him and that was that. These days, there are 17 pages worth of insults hurled back at the OP for posting some dumb remark.