I was thinking what if there was some kind of trophy system which centered around PvP, you would collect items off of players you kill such as ears or something like that. This could be split between bandit kill and survivor rescues as well. The system could also go deeper and include a way to turn in the trophies for special items, so the longer you survive and more people you kill/rescue the better reward you can obtain. Probably best to just be cosmetic items in my opinion. These trophies could also be looted off dead players to make for a bigger risk.