I see. Everyone gets real mad about killing them but they seem kinda dumb
They are taking up space on a server that could be used by people who would have an actual impact on the game, and if someone does kill one a player might get mad even though he is not obligated at all to follow these peoples completely made up rules. Also, someone might not know if a player is a friendly when they kill them. It may be easy to see normally if someone is just taunting and not fighting, but in the chaos of combat its hard to tell who and who not to shoot.