i really hate russia for historical reasons but to say that every russian that comes to your site is a spammer that is really hazardous
there are many us spammers, actually usa is the "best" in the world when it comes to spam
anyway a mod for blocking spammers by ip is a very good
10x
i fear that the database from
http://www.ipdeny.com/ipblocks could be somehow false - positive in some cases because for one bad user you could block 100 good ones if they use the same ip