Sony patents Tag to block game rentals

Sony has patented a tag (AKA a RF tag) that will prevent using the same game on several devices, probably killing game rentals. The patent has been given to sony on Jan 3rd 2013, here you can find more info and the images of the patent:

http://www.noshitshurlock.com/sony-to-block-second-hand-games-on-playstation-4/

What do you think? Is this a good or bad thing?