Wouldn't blocking 2nd hand game sales violate the "First-Sale Doctrine" rights that we as consumers have?
Sure, D3 broke sales records on its opening weekend. So? The only reason people got that was because of brand loyalty. D2 was an amazing game, and people wanted more. But D3 has revealed itself to be nothing more than a money-grabbing shadow of its former self. How many people who got the game are still playing it now? How many people would by a D3 expansion, or even D4? Activision Blizzard lost a lot of fans with their move, so congrats on them for making a killing in the short term, because in the long term they signed a death sentence for that franchise and earned a black mark on the entire company.