This amounts to censorship. ISP's will have to monitor all traffic and it will be impossible for them to determine with 100% accuracy what is piracy and what is not. Governments simply don't have a clue how the Internet works.
We could white list file delivery such that only desirables are permitted to serve files. How American, I mean Nazi like. It could be done. The question is, do we really want what it would take to do it.