You should give the origin for that case, that has happened in 2007, for example there:
http://www.pcworld.com/article/13632...ling_wifi.html
Anyways, the whole case is stupid. In Germany you can't get charged for using unsecured WiFi. But - and that makes sense - as an owner of an WiFi access point you have the responsibilty for that, means, you have to make it secure.