I'm confused, is insubordination not enough of a reason to kick someone off? So we have the steering committee and a set of moderators that serve at their pleasure. If they don't listen to the committee and it's enough to get a vote passed to remove them then they're gone? Why all the cloak and dagger?
But also, I can imagine if you believe this person is about to make a colossal stink about it I would probably prepare a "pr packet" too because you're going to need something to say.
