On April 26, 2007,
Project Honey Pot filed a $1 Billion Dollar Plus
lawsuit against spammers in a court in the Eastern District of Virginia. The suit seeks damages on behalf of its members and targets a "large swath" of known spammers and email address harvesters, and is the biggest anti-spam lawsuit ever filed. There is an unspecified number of John Doe defendants represented by more than 2.5 million IP Addresses. You can read a copy of the complaint
here.