I think if you provide the right clues and information it would allow us to make an informed decision on whether to fight someone or not. Like if you make sure to point out that the person they're dealing with is an influential nobleman or something like that, then we could reasonably gather that there would be consequences to killing them and chose to act accordingly. I don't think any of our characters are so bloodthirsty that they would jump to killing someone when it would be obviously disadvantageous.