Even if they do make it to court; how do they plan on translating an IP address into the ID of the actual infringer? (not the ISP subscriber, they can't be assumed to be the same, particularly in court)

Just because I pay for my families internet connection doesn't make me responsible, culpable, or even aware of their activities. Even less so now that I'm not going to receive any notice of potentially illicit activity.

If they could haul people into court based on just an IP and get somewhere useful, they'd have done it hundreds of thousands of times over already.