OP's problem is with LW allowing a certain person they don't like to become moderator of the server. They could block the user, but their issue is that the specific user has power in an LW community.
If OP doesn't like that, and feels like that moderators presence is a non-negotiable, she has options.
Let's be real. What OP really wants is for a certain moderator to not have power on a server she deems as influential. Thus, she's trying to leverage peer pressure in order to make that happen.
But the moderator can join any server or create her own as well. So trying to remove her perceived influence is basically playing whack-a-mole, and because she herself doesn't run any servers, peer pressure is an ineffective tool.
So if the moderator is that objectionable, the reasonable thing to do is either:
If neither of these options have the desired results, then I'm sorry -- that's just life.