I was a spam warrior for awhile but it takes too much time to go after them all and they just get another account.
Yes, they do. But the places that spammers can go and spam with impunity are getting fewer and fewer. SPEWS, MAPS, there's all sorts of resources and blocklists out there that are making a difference in the war against the spammer.
Essentially, unchecked spamming will eventually render e-mail useless as a communications medium, and I'm not ready for that to happen.
And yes, the wall starts to feel good after a while as you beat your head against it ...