Internetworkers: http://www.ibiblio.org/internetworkers/

["Michael D. Thomas"<mdthomas AT mindspring.com>]

The answer is distributed meta-spam: spam
the spammers. Use the power of distributed
computing as well as various domain names.

Make it so difficult to find valid leads
that their cost of operations becomes 
prohibitive.

Legal, too, as long as you put the "do
this to unsubscribe" note in the email.