Give me your best anti-necromancy argumnents

Last session party necromancer expressed willingness to debate court archmage over the right to perform necromancy in the kingdom. It will be a LONG time before this happens, but in case if do, I want some good arguments to present by, so it's a challenge for the character and the player. Could you give me your best argument against necromancy, and I will save this thread to cross-reference once that thing comes in my game?

Obviously, if this sounds like somethign that happenned in a game where you're a player, you are likely my player so DO NOT READ THE COMMENTS to not spoil your future fun ;)