Re: Foster, versus Foster's iPad-wielding friend
I agree mostly, but there's an important thing here. Nobody is under a legal obligation to enforce someone else's civil contract or to prevent a ciminal act. You certainly shouldn't facilitate it (aiding), but even if you're of it going on, you don't have to take any steps to stop it. Of course, if asked by a suitable legal authority what happened, you must tell them the truth etc.
So, even if he was aware of his friend streaming it and knows his friend was breaching the copyright (civil matter), he is not obliged anywhere to take actions to stop it. The issue here is that by allowing his iPad and broadband to be used, he could be argued to be aiding it and effectively involved rather than simply dormant in the matter. They would argue he has supplied material help. However, in any event, he is at worst an accomplice, but the real perpetrator is whoever did the streaming.