A dubious milestone, indeed! At least they get caught before registering rather than deleting them manually.
A forum I moderate has only two moderators left. The admin had abandoned us, and the amount of spam drove off the other moderators. The last two wrote to the admin and told him we were leaving unless he fixed it. He did; he closed all new registration... So we have a nice quiet forum with a constantly dwindling participation and no new blood.
Glad you guys are involved, and don't have to go to drastic measures here!
Steve