So basically, the forums I run has over 10,000 accounts, the majority of which are spammers. The good news is that they can no longer make accounts thanks to the sonnb - Stop Spam Here add-on. The bad news is, there are an overwhelming amount of spam accounts left. Now these registrations occurred over a great length of time, so removing them within a specific time frame is out of the question. They also have variable account names, different IP's, etc. So removing them using a similarity there seems impossible. The best possible way in my opinion is to somehow select the legit users, and simply delete the rest. Second best would be to use the user list provided and check off names for deletion instead of deleting everyone individually. Anyone have any suggestions? Also, are usernames accessible from the FTP? If so, where?