The Mac App Store: It’s an honor thing →
Whenever one introduces some sort of piracy prevention, one makes it a little bit more difficult for people who are willing to buy whatever one is trying to sell. It also makes it more difficult for people who are trying to obtain illegal copies, but those who insist on doing this will often have the tenacity to soldier through it.
It’s a battle that can’t be won, and so one might as well make it easier for the honest ones.