Where does that leave punches and kicks? Or team hits of any type for that matter. If you can do it, you can do it do team mates seems to be the direction of the game. Problem is then you're left with human judgement as to how to use it. So you create measures to help alleviate the situation, such as being able to report griefing attacks of any type, or as many as possible. Point in my mind is, if you're fucking around with friends then you have nothing to worry about, presumably. If you're fucking around with randoms and they're not into it, why not have a way of persuading you not to? Otherwise all the power is on one side with no repercussion. Being able to report grief strikes evens things out a bit.