I have a very large vbulletin forum that's been steadily accumulating a crazy amount of spammers. While I've been blocked a ton of ranges/etc they just keep coming. Looking forward to a better situation here with Xenforo. I want to migrate as soon as possible, but the database size is already about 4 gigs (that includes a lot of posts, none of which I'd like to prune). Part of me wondered if pruning users on vbulletin's end (which is pretty painful or impossible to do easily) would help, another part of me thinks I should just move everything over in bulk and prune here on xenforo, given the (seemingly) excellent spam-checking user tool. What do you think? I don't mind the forum being down for a few hours while migration happens so if its just a small time saving issue it's ok. Just going for what will be easier to prune.