This has been mentioned before, but I'll say it again.
If I upload Batman to my personal storage locker, and never share it with anyone else, and then a pirate uploads Batman and shares it with everyone, why should I lose my digital copy of Batman due to the actions of someone else?
Maybe I don't have a thorough understanding of now Hashes work, but if we both rip the same movie with the same software, won't that file have the same hash?