rrlund is correct.
I never saw the post, but it was sent to me and yes, I thought it was funny. It wasn't the context of the post, but that he impersonated someone. Impersonating someone is a huge breach of the rules and really, in my opinion, Kim is pretty lenient.
I did contact Kim on Dave's behalf and got a long reply from Kim as to why he was banned. Apparently, that post was the last straw.
I'm sorry it happened, but this is Kim's site and she made the call.