Re: The real point
". So, how is he liable. That's like saying if someone steals your car and runs someone over, you're liable as it's your car. The person actually doing it is liable, nothing to do with the device or account involved."
Whilst the person who actually did it is liable, as the owner of the vehicle you also may incur liability - particularly if you hadn't reported the car stolen, depending largely on whether the police can identify and apprehend the person who was driving the car.
[ http://www.mirror.co.uk/news/uk-news/hit-run-driver-caught-camera-7299122 ]
Also in this case the guy will have signed an agreement with Sky probably for both his usage of Sky TV and of his broadband...