matchbox (DayZ)

I had an idea like this, it involved having a level of psychosis that was proportional to your humanity meter. When it was high you would hear noises etc like you mentioned, but it also involved having increasingly shaky hands. This would be a way of alerting other players to your bandit status. I like your idea better than mine to be honest, instant punishment for killing seems as though it would work better than longer-term nerfs