Yes, remove them. Like other posters have said, it's simply not realistic that you get a giant floating marker saying "This player has killed someone!" Sidenote: Considering I lose most of my gear when I turn from bandit to survivor 100% of the time due to a bug, once I go bandit from something (self-defense, player killing, accidental friendly fire, doesn't matter), there's no reason for me to not deathmatch anyone I see just so I don't lose my gear. That and humanity should be static based on player actions, not slowly rising/falling if you're within a certain number.