I think the picture already speaks for itself. I'm on the grind for Dredgen right now, and I honestly don't remember when I've had a team that did [b]not[/b] have at least one person AFKing during the entire match, or halfway-through. This has been going on for months now, and it's getting absolutely ridiculous. I don't know if you're taking action on this at all, but if you do, it's certainly not enough. Needless to say, it's entirely breaking the experience for a lot of players, and rewarding those who are doing literally nothing. If bot detection or player reports on inactivity aren't enough, maybe looking at the stats will help. If someone hasn't achieved a single kill/banked mote/whatever in a number of games, it's safe to assume they are guilty of AFKing. I don't know if that's a possible thing to log/control, but as a suggestion on how to improve something is a vital part of giving feedback, that's what I'm suggesting. Please Bungie, just finally do something about this. This is getting completely out of hand.
Its really simple to stop afk activity, Bungie needs to change the requirements of weekly and daily bounties so that you have to participate, in other words, kill /bank x amount and complete the match. Rewarding people for doing nothing encourages Afk behaviour.