I always wondered this, for years and years now- why, where ever I go there was an AD HOC network called "Free Public Wifi" that never did anything at all... Now I know.
http://www.terminally-incoherent.com/blog/2008/06/04/free-public-wifi-epidemic/
http://www.terminally-incoherent.com/blog/2008/06/04/free-public-wifi-epidemic/