I always report them and leave. I've seen 3 AFKers get exotics after strikes, I'm not carrying anyone anymore. What really gets me is that they are actually there. They know Bungie changed things a bit to try and deter it. You used to get people just fire up the strike playlist then go away and come back before the inactivity boot, flick the stick then sod off again. Or rubber band it. But those who actually stay and don't help? Why the hell not! Play the game you cretins! Then you get those who start a strike and go farming instead. Don't encourage them, just report and leave.