... because if _use_ of a product creates a liability for the maker, you are very quickly headed toward liability for gun manufacturers. [ed: this is very much discussed in the decision, by the by]

Expect to see heavy lobbying from the music and video industry to create some kind of "Know your Customer" regime internet service providers in order to create such a liability.

I wouldn't call this a slam dunk for privacy or liberty, given what it is going to force the various actors to do in response.

For now, though, let the file sharing flow!