The quest to forbid and somehow eradicate file sharing, especially in the realms of film and music, is simply a fight against the inevitable. It is a battle the entertainment industry is bound to lose, especially since they themselves promote and continue to advance the very technology and systems that allow and enable such behavior.
The only people who would benefit from a download ban would be record company executives. For years, musicians and their songs have been ripped off by greedy record execs. If they utilize the internet they are able to release their own music and retain control of it and how it is used in the future. Plus, they will actually see financial reward from the sale of their music.