An article on the subject of copy protection has spawned quite a bit of debate. The author is the CEO of a PC gaming company, and here is his main point:
The reason why we don't put CD copy protection on our games isn't because we're nice guys. We do it because the people who actually buy games don't like to mess with it. Our customers make the rules, not the pirates. Pirates don't count. We know our customers could pirate our games if they want but choose to support our efforts. So we return the favor - we make the games they want and deliver them how they want it. This is also known as operating like every other industry outside the PC game industry.
I've heard a number of reactions to this article, and it runs the spectrum. If you work in an industry where piracy is an issue--software, music, movies--you should read it and decide for yourself.