If we're going to have an "anything goes" forum, where users self moderate their own view by muting content, I think it's appropriate to be able to mute mods (or alternatively, for mods not to post in the forum other than officially).
One idea we could borrow from other sites is a "mod mode" for posts- where moderators are able to post and be muted as per normal users, but when they need to say something official they can make a post in mod mode (that is visible to all).
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I've said this before, but I'm in favour of more moderation to reduce the mud slinging.
This isn't because I'm upset by the mud slinging- it's because I want to use the forum to talk about diplomacy, and efforts to do so are frustrated every time something blows up like this. Each time some drama happens, 2-3 new threads are created, then parody threads of those, then complaints about the number of threads, then parodies of the complaints etc. I can mute them all, but even muted threads take up space on the front page (they're just hidden by the browser). My front page was blank except for the live game thread earlier this week. This is pretty annoying- it makes it hard to use the forum for what (I assume) it was originally intended for- discussing diplomacy and setting up games.