Brilliant idea, I've been using their database for a while now and having to remember to update the blocked IP's and emails was getting hard to remember. This will ease some off the pressure on us to keep the address lists up to date, thank you.
I only found out about this mod as it's linked to from vBulletin.com on this post
http://www.vbulletin.com/forum/showp...&postcount=157
, that doesn't happen too often