I'm going to suggest this: take it up with the mods themselves. Even if you guys consider them "shit" for not tossing Phase to the curb the second she did stuff like this, they are reasonable people.

No OBVIOUS sock accounts, no attempted anon postings, PM them or contact them on Plurk or something. Let them know that you want to play, but you won't because she's there and you feel that being there is a deterrent.