We all know that a lot of npc's in Skyrim are essential and if you take that away you can get stuck with unfinishable quests. So what I'd like to ask is if it would be possible to implement the system used in New Vegas, where if you kill someone you fail the quests they could have given/completed/been necessary for. I really hate cluttering up my journal or leaving quests unfinished, but I hate the essential npc's even more. So how possible is this? Or has it already been done, maybe?