Wizards of the Coast, which now owns the rights to Dungeons and Dragons, had this bright idea:
It was an eventful Monday for Wizards of the Coast. First, the company discontinued all sales of its products in PDF form, through sites such as DriveThruRPG and Paizo.com. The same day that WotC took its digital product marbles and went home, the company filed suit against eight defendants, in the United States, Poland and the Philippines, for copyright infringement of the Player’s Handbook 2 (released last month). According to the lawsuit, the defendants allegedly engaged in the illegal distribution of electronic copies of the PHB2 through file sharing websites.