I think he probably tried to access the site from his cellphone when it was down. Just bad timing. I don't think they'd block more than one IP associated with an account. The problem with doing that is that they don't know how many people use that IP to log into the forum. For instance, what if they ended up blocking Bryant Park's free wifi signal in New York. There's a good chance one or two other people might use that signal to log into the forum (maybe on their lunch break) and they would be blocked as well.
I wish Bub well and hope he reconsiders, he's one of the personalities here and no matter what you think of him he's integral to the community. What did he do to break the TOS anyway?