I stopped and gazed on the little dull man who was being paid to be a teacher of teachers. I turned and walked to the door, slammed it closed with a bang, and broken glass crashed to the floor. There was uproar behind me in the class, which did not interest me at all.
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?