People don't want to die, and killers don't want to let people off for free. So i think there is a possibility to add some kind of capture mechanic to the game, allowing violent characters to capture rather then kill a person.
The captured person doesn't want to die and therefor is willing to continue to play under more restricted circumstances. I'm not sure how such a system would work, but it would be along the lines of using a rope to apprehend an unconscious target, or a conscious target that has surrendered (meaning they'll sit still while they're tied up). The character now becomes more or less an object, able to be carried and stored in a boat, instead of being a bag in the boat, they'll appear as normal i guess, though they'll have no control over their movement.
The tied effect would last an hour to prevent people from just being tied up and disposed of to suffer a fate worse then death, permanently bound and left somewhere. The bound person most likely would be transported to a prison of some sort, built and maintained by the captor, inside will be an item that acts simularly to the hitching post but keeps a hearthling bound by rope but perhaps not limited in movement. They'll be unable to fast travel away and would be stuck to the item, maybe a ball and chain. It would allow them to move around inside the locked area but unable to fast travel away. they can log out and function as normal, probably forced to provide labor to the captor in exchange for eventual release or simply to be allowed to continue to live.
Let me know what you think, any improvements or suggestions.