It's because of you Nofx has won.
If you would just ignore him and let his antics die without response he would go away. Because you start threads to ban him you are feeding into his attention-whoring antics. He is reading all of the threads that you started laughing his ass off.
Like I said in another thread; the best way to get rid of a class clown is to not laugh at his jokes. If you just simply not respond to his antics, ignore them all together regardless of how vile and evil they are then he'll be gone in less than a month. He does it to get everyone's panties into a bunch and It's obviously working like a charm. Any publicity, regardless of how bad is good publicity.
Don't click or respond to his threads and ignore his posts. It's really that simple.