There was an item on zdnet.com security blog yesterday about someone in Germany being fined for having a wireless network with no password. It was through a court action taken by a musician whose work had been pirated in that way.
It goes on to say that in several countries, including US, police have been scanning for open wireless connections and warning citizens of their danger since at least 2006.
Doubtless in some countries this comes under the same computer misuse act that prevents ISPs detecting virus/spam traffic on their networks and turning off or limiting offending connections. Shame, really.
Also a shame that major TV networks don't run prime-time programmes about internet hazards. At least, they don't here in the UK. Even the google story has been relegated to the tech news section of the BBC web site.