DRM is a bit backwards, honestly. It places restrictions on people who choose to pay for their software, effectively punishing them for being honest, while people who choose to pirate get a hacked version of the same thing with all the restrictions removed. This essentially means that by pirating software, you're not only getting it free, but you're receiving a more usable and better quality product than users who pay for a license. Implementing DRM doesn't even make piracy any more difficult, because once the particular method of DRM is cracked (which frequently happens withing a few days thanks to individuals and teams who dedicate themselves to such hacking), illegally downloading a DRM protected piece of software is just as easy as one with no protection. In fact, this hacked software might actually be easier to obtain and use than legitimate copies, being as there are many examples of DRM implementations unjustly locking a paying customer out of their software due to a software bug or a license technicality. Removing DRM from software certainly won't stop piracy, but it will at least allow honest consumers to enjoy the software they paid for free of complications, thereby not rewarding people for downloading illegal copies.
FTC Town Hall to Address Digital Rights Management Technologies - Event Takes Place Wednesday, March 25, 2009, in Seattle #539814-00423
FTC Town Hall to Address Digital Rights Management Technologies - Event Takes Place Wednesday, March 25, 2009, in Seattle