I recently converted from vbulletin to xenforum (very happy about that), and I have I would estimate 75,000 members that I need to delete who have 0 posts, and joined the old vbulletin for the purpose of spamming the profile page or similar. Is there a clean way to purge these from the database?
Be very careful with using it. I tried that before and deleted some that I shouldn't have. It does not have advanced filtering system so you may end up deleting the good users as well.
I wish it shows you a preview of usernames before you delete.