From ComputerWorld, "A federal lawsuit filed in Massachusetts could test the question of whether individuals who leave their wireless networks unsecured can be held liable if someone uses the network to illegally download copyrighted content."
A porn company is suing 20 people in Massachusetts over BitTorrent downloads of its porn movies over an open wi-fi connection. The owner of the open access point (AP) is being called liable because he shouldn't allow it to be unrestricted. This would make libraries, municipalities, schools, airports, hotels, and Starbucks liable for anything downloaded via their bandwidth.
This would be a good article to use to sell secure WLAN management services.