Originally Posted by Pants
How do you propose M$ or Sony authenticate a digital copy of a game? It's not about being evil or being "silly little girls", lol... it's about making sure that the games you're about can only be played by you. Your friend can't play The Last of Us at the same time you're playing unless he has a disc in his PS3, right? Those "restrictions" work the same exact way as disc based games, except without the discs.
But they could have done it for just the digital download of the game. Surely there is a way to do family sharing with just a digital library. I also think they could allow people the choice of having the 24 hour checkin or not too.