The war against file-sharing is essentially a war against the distribution of uncopyrighted metadata, not against the distribution of copyrighted material. It is about hindering the ever-present piracy from globalizing and open indexing, pushing it back to the family and the schoolyard and the workplace. Scaling-down, not in quantity but in network scale, from peer-to-peer to person-to-person.
The result is not less piracy, but less plurality in piracy.