Voadam
Legend
Weeellll.... Here's where things get dicey. Concepts of the Soul (or Consciousness) and how you define those things get in the way. For example, if you assume there is no soul or that the soul is free of the body upon death (and the corpse is just so much leftover meat) than necromancy might have some ethical element to it; its literally recycling the body into a form that can labor endlessly without much of the problems a living being has. However, if you assume the soul or whatever is somehow still tied to the body after death, necromancy could be viewed as a form of slavery (even if voluntarily entered) for all eternity. Since modern science has yet to clearly determine what IS consciousness or what a Soul is (let alone what happens to either upon death) you could feasibly argue necromancy is simply reanimating meat or a form of eternal hellish slavery for all time. The jury is still out on that one.
I don't think D&D has ever defined the magic animating zombies and skeletons as yanking the departed souls of the dead from the outer planes to mindlessly animate their old bodies. Most of D&D had the souls departing the body and going to an afterlife in the outer planes and sometimes becoming a petitioner or other outsider. The most impact would usually be not being able to raise them while their body was in an undead state.
4e had a whole specific theory of that kind of stuff in their undead book with the different parts and aspects of the soul and my recollection is that animating the body for zombies and skeletons did not affect the departed soul parts.