SMF has a facility to automatically mute a user (i.e., prevent them from posting) when a particular warning level is reached. Today, lolwut hit that warning level and was muted for a while, though I've now disabled that facility in the admin panel, so he can post again.
To me, this seems like unnecessary duplication of functionality -- this is why we have bans, warnings should be something else. Do others agree with this line of reasoning, or do you guys think automatic muting is useful?