I came across this wonderful page today.  It approaches the issue of stopping spam in a

very different way, by targeting the spammers and destroying their profit

rather than blocking their emails. 

SpamVampire is a great idea, sucking the spammers bandwidth to the point

that it’s costing them more than they make—This must be effective as the

spammers have gone so far as to give death threats to the creator!  This phone transcript

was particularly amusing!