No need to defend an absolutely horrible feature. Like Sales said, they can easily fix it with an update, so it's not real a big deal. Also, it might be nothing more than a rumour. But defend it? Seriously?
When I heard about second hand games not being allowed on ps4, I was quite upset, not because I buy used games (I only buy COD games for my friends used, as I don't believe Activision truly deserves my money), but because it's terrible for many if not most consumers, who unlike me, can't afford most games and have to keep selling their older games. If they don't buy a ps4, then that affects my entertainment as well, as I'll have an awesome console with no games. I was glad to see many ps fans expressing their disappointment when they heard that rumour.