My point is that this game has "Reputation", and the fact that this system is tied to factions makes the concept of not engaging in conflicts with a single person somewhat difficult to grasp. (*I'm not saying that the developers are lying!) Basically you would have to please every faction so as not to kill a single person. So does this mean that you can trick every faction into believing that you support them and only them? What if one of them wants you to kill another? Then will you have to do some sort of speech check to convince the said faction to disappear or disband?
Don't get me wrong, I love this kind of a challenge (especially since I always play through FO3 with maximum Good Karma and DON'T farm purified water to give to homeless). But I'm just finding it difficult to wrap my head around not killing anyone.
PS: I'm making the assumption that kills are only related to faction affairs and also that Mutants and Raiders are exempt.
PPS: Then again, knowing the answer to this could spoil some of the fun of figuring this out on my own...