Maybe some people actually do have fun playing to get their stats higher, had you thought of that? Also, does that mean you would not let your girlfriend play if there was a global ranking system? I let my fiance play of she wants to. Her learning curve was on my CoD4 kd, and I still got it up to a 1.6 last I looked (years ago). I played that game so much that my accuracy glitched and turned negative