This may run counter to what your common sense tells you but, a new paper out of Duke and Rice University says that ditching DRM could actually reduce piracy.[…]
In fact, the researchers say, « only the legal users pay the price and suffer from the restrictions [of DRM]. » Many consumers simply choose to pirate music and movies because doing simple things, like backing up a media collection, is difficult with DRMed content.[…]
http://www.engadget.com/2011/10/09/ditching-drm-could-reduce-piracy-prices-inconvenience/