Batman: Arkham Asylum features secret glitch to foil pirates.

Didn't they learn a lesson from Titan's Quest? http://www.quartertothree.com/game-talk/showthread.php?t=426...

If you must use DRM, make sure the user knows that the DRM failed, not the product itself. Don't silently make the game unwinnable or dump to the desktop with no explanation. Otherwise you're going to hurt your product's reputation.

Bah... EA tried doing this with Godfather: The Game. The PC version, when pirated would not allow the player to exit out of a vehicle. However, a new patch was made which addressed the issue and allowed pirates to play as they wanted.