While we're on the subject of necromancy, I figured I'd give the rhetorical question in Draken's sig an answer since it's been bugging me for a while actually :P

At least as far as pathfinder canon goes if you're on Golarion (which is my familiarity, I assume that D&D runs vaguely similar), necromancy is [i]not[/i] strictly evil - there are many spells, like speak with dead, which do not involve actually raising dead, and don't piss off Pharasma (basically hades). The reason that raising dead is specifically evil, looking beyond the moral factors that exist on the mortal plane, is that you literally are bringing everyone closer to the heat death of the universe when you do it. 

So pretty much, Pharasma has this gigantic line of souls of people not dedicated to a god that she has between her plane and a god called Groetus. when you raise a soul from the dead, you run a good chance of pulling someone from that line, since creating undead (even unintelligent undead) draws the soul back to the body. Why is that bad? well, when Pharasma runs out of souls in that line, she runs out of souls to feed to Groetus. This pisses Groetus off, and he initiates the end times. Sorta a Ragnarok deal, ya know. 

I'm sure everyone cared :V