What about connection issues? You could be lagged out and that's not your fault, you didn't intentionally leave the game. What if your raiding and it's taking extra long. Your tired got class or work in the morning and go to go. What then you get banned because you have obligations. Sometimes unavoidable situations occur and there's nothing you can do about it. It's happened to me and probably others. I like where your heads at and I hate people who afk just for rewards. I hate people who leave mid strike. There is no way though that bungie could implement a system that could catch all of these issues.