Note to JohnRob: maintain a list of partial IPs if you are not already doing it. See where the breakout is for multiply banned freepers. Have a probation flag for newbies with partially matching IPs.
Well certain network providers like AOL and MSN assign random numbers from throughout their entire class B address spaces making such a breakout completely futile. And seeing as how every liberal in the country gets a AOL disk in their mailbox each week.... well, we're doomed I tell you! They sending us up the bomb!! All our bases are belong to them! Surrender to Moby now!