I don't like that the option would be about killing the character by another name with different effects. How about naming the new option "drive off" and results in a small message on the right "[character name] escapes to far away land is never seen again" instead of the usual message that tells you that the character might appear again. Additionally I would like to see an option to change the default action after combat as well. So I can kill, rape or drive off all characters after every combat without having to go through the dropdown menu for every enemy every time.