If there is an option to talk with the raiders and slavers and deal with them peacefully and they have done nothing to you, you should get bad karma if you just go in killing. New Vegas is set up so you decide who is bad or good. The Legion are not the bad guys its pretty much up to you to decided that. Stealing is still stealing does not matter who you are stealing from.
Issue is that I never said this was a situation where you could talk to them. I am talking about a pure random encounter/they have a few cots sort of thing, not named NPCs and discussion. As for the Legion- they are dead. They are slavers. My guy needs to take a nap. I am not saying such things are right or wrong- I am saying that my Karmic balance should not change so much when I take those stimpacks and items from evil dead men that when I go to save my game it says I have neutral karma when anybody in the universe save for the Raiders would say, "Hey, thanks for killing those bastards."
I'm not saying that I need to get good karma. I'm just saying that the universe shouldn't judge me as a [censored] for taking a stimpack from a storage locker that was owned by a slavin' sumofa[censored] because I have three HP left.