Normal
To be fair though, no one's really expecting that. This is a privately owned forum, so it's entirely up to the owners' discretion to ban or moderate anyone they see fit, for whatever reason they want. Now, obviously that might not go over well with some of the forum members, so ultimately it might not be in anyone's best interest if the owner/moderators are perceived as raging authoritarians, but my point is the only justification that might be needed here is not a legal one, but one that appeals to the ethical sensibilities of the majority of the forum membership.