So this has a number of major flaws 1: If you can't tell bandits from survivors based on their appearence that means survivors will KoS as soon as that warning appears. I would kill everyone I run into, including other survivors, which would bring me closer to death by sadness. Even if you can tell them apart it might be very hard to to tell at a distance, so I might still shoot another survivor. 2: New type of grefing: play as a survivor and force the hand of other survivors by attacking them. They have to kill you or they die. When they kill you they get closer to death by sadness. 3: If you can tell bandits from survivors, then all survivor encounters are gonna be almost completely void of uncertainty and tension because you know the survivor you ran into most likely wont do anything. This goes against the essence of this game in every way. 4: None of this actually addresses the real problem in the game, which is not people killing on sight, but the reasons they do so. There are two main reasons, one being benefit vs risk: There is near 0 benefit from cooperating with a stranger vs a fairly high probability that this player might kill you if you approach him/her. The other reason is simply boredom, which is also related to the first reason. If surviving was actually a challenge people wouldn't be bored as easily.