Do you mean just Threads they start or Threads and Comments?

I doubt if the admin/moderators are online permanently enough to allow near-instant approval of comments from those on probation, so it wouldn't work for comments.

And Brit's right, they'd just create a new ID. Impossible to track them via IP due to qtel's weird "group" IP allocation system.

QS - admin have always been good at responding to reports of abusive PMs. Just report it via the contact link.