If you live in Utah, and have children, you need to visit this site. You simply enter your email adresses, and anyone who sends adult-oriented spam is required to remove your email adress from their list. Those that fail to do so will face felony charges and "substantial civil and criminal fines".
For those who don't live in Utah, check with your state governement - if they don't have a similar registry, then contact your legislators and ask them to create one! It may not end the onslaught of adult-oriented spam, but it certainly will have a positive impact.
Thank you State of Utah! I, for one, sincerely appreciate this initiative.