I think they ought to tread very carefully and very lightly. Imagine if there was an internet where you can't just remove something. Sure, you can see the IP address of the people hosting/distributing the material, but there are numerous ways to disguise that.
Suddenly, via P2P everyone becomes their own client _and_ server, and the _only_ way to remove content is to ensure everyone in the pool no longer has it.
Good luck with that.