From everything that I've seen written here about Skyring,
if it is correct then we returned to the point we were at a few months ago when it appeared that a group of neo-Nazis might take over Wikipedia, & Jimbo announced that he would take any measure to prevent them. In other words, extreme remasures are now needed -- for example, either a DMCA lawsuit or finding some muscular hard cases who will "discourage" him from making further posts to Wikipedia. (Yes, I'm joking about the last option. Mostly.)
If that is the case, I hope a first step before this would be to talk to the ISPs involved first -- even if they blow us off, then seek the help of any Internet activists in Australia. That way, when we do something extreme like block all anons & new accounts from Australia, it will help minimize the ill will that ensues.
Not sure what else I could contribute to this discussion. He's become a difficult problem, & all of the easy solutions have been tried & shown not to work. And he's gotten to the point where attacking Wikipedia has become his life: calling that "pathetic" doesn't properly do it justice.
Geoff