Spammers suing spam victims.
http://arstechnica.com/news.ars/post/20050316-4712.html

Imagine asking a corporation to stop spamming you and instead of honoring your request, it sues you in federal court and continues to send the same unwanted, junk email you asked it to stop sending in the first place.
http://arstechnica.com/news.ars/post/20050316-4712.html