"The FTC said in a statement that AdultFriendFinder affiliates used pop-up ads to drive traffic to the site, and exposed consumers, including children to sexual explicit images when search for terms including “flowers,” “travel,” and “vacations.” More seriously the FTC alleged that the ads were also distributed with spyware and adware."
http://www.techcrunch.com/2007/12/07...-porn-pop-ups/