Are we more concerned about a list intended to improve Wikipedia than we are about a list and forum used to harm Wikipedia?
There are things we can do about Wikipedia mailing lists and Wikipedians. There is nothing (or, at least, very little) we can do about Wikipedia Review. They are completely independent and can and will do whatever they like. The only way we can do anything to stop them is by legal action (I haven't investigated the matter closely enough to know if they've done anything worthy of such action).