Very good article at Newsweek on how to deal with piracy...
Coelho Gives Away His Books - Newsweek
Confirming the fact that theless restrictions on usage, the more people will willingly pay instead of pirating it.
Same applies to software, hardware, whatever. If you make it difficult for the legitimate user/owner/reader/listener to use then they will use the priated version. Music and Film companies take note.