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?
“You are today where your thoughts have brought you; you will be tomorrow where your thoughts take you.”
“Not because they were servants were we so reserved, for many noble persons are forced to serve through necessity, but by reason the vulgar sort of servants are as ill bred as meanly born, giving children ill examples and worse counsel.”