The direct quote in question is "Boosted your self to 99 rating?" As far as i'm concerned he's asking a question in a joiking manner, not accusing you of anything. That said, Cribb has made it clear that even jokes won't be accepted on the topic.
Yeah, he was joking, but he was already given a 0-point warning for this post: And the warning said: So he knew he couldn't do that.