The Spamhaus Project

The Spamhaus Project:

Spamhaus tracks the Internet's Spammers, Spam Gangs and Spam Services, provides dependable realtime anti-spam protection for Internet networks, and works with Law Enforcement to identify and pursue spammers worldwide.

Spamhaus even has a list/database (ROKSO database) of the top known spammers and spam gangs with very detailed dossiers on each. Some even have the spammer's pictures, licenses, passports (fake and real), etc.

80% of spam received by Internet users in North America and Europe can be traced via aliases and addresses, redirects, hosting locations of sites and domains, to a hard-core group of around 200 known spam operations ("spam gangs"), almost all of whom are listed in the ROKSO database.