I did the same thing to a phpBB forum I look after. Once I changed to a security question the spam accounts stopped...

This would free up the moderators time to have a life outside of deleting spam accounts and posts...

It's up to us to help though. I just reported a spam thread that was three hours old and had 55 hits. It takes like 3 seconds to report it, so that's what all of us should do.

How do you report it? Is there a button somewhere that I am missing?
Thnx