Here we go again. This particular spammer filled out the private information field extensively, indicating that she was a teacher with lots of detail. Makes me very mad. The only option it may leave is for me to approve every new forum discussion, which I think I'm going to need to do for a while.
Believe me, it's not for lack of trying! I've spent hours and hours on this. The discussions should be delete the members. And when they are not, I'm going through and deleting each individual discussion and they still don't get deleted. I've emailed Ning several times and I can only believe that this is a larger problem since they don't seem to have solved it.
As it seems to be the same handful of people who are posting multiple times, perhaps you could call on trusted members to monitor the site over the weekend & keep an eye on it. If you gave them admin priviledges, they could suspend people who are spamming as soon as they start doing it.
While this wouldn't stop it entirely, it might scale the problem down to a more manageable level.
The problem is that even with admin rights, Ning is not working like it should and those other members wouldn't have any more luck than I am. So while I wish there were something that could be done, this is unfortunately--right now--something out of our control. :(