As far as I'm aware there has still not yet been a succesful UK prosecution in which the owner of a wireless network has been found guilty of what others have downloaded on the network
When it came to providing evidence, the copyright police have always caved in. They make their money by scaring people into compromising and paying up before it goes to court......
the biggest crook (sorry lawyer) in the game got his wings clipped last year anyway, and was bankrupted after being caught indulging in legally incorrect practices: sending out thousands of threatening letters with no evidence to back them up