Given that you'll never be able to prevent copying, the question is, what can you do to minimize it? What can you do to make consumers happy enough with legitimate use of the system that they'll be willing to pay for it?
Edward FeltenInnovation happens because there are people out there doing and trying a lot of different things.
Edward FeltenGiven a choice between dancing pigs and security, users will pick dancing pigs every time.
Edward Felten