In the future, I think I'd prefer to just have them make their case via PM to be reposted at our own discretion, particularly in light of how this one has been going.
In other words, if they've been an !@#$%^& everywhere else, there's absolutely no reason to assume that they won't be the same in a Magistrate case, which we clearly don't need. Leave the mute on, just let us know they've been muted so we can contact them directly to get their side of the story.