If you were to call up and bind a Spirit like Bob, then it's not Necromancy, it's Enthrallment, which isanother Law entirely. This also can be gotten around by merely summoning the Spirit with Magic, prepping the vessel with magic, but convincing the spirit to act on its own.
* Using magic to animate a corpse like a marionette is fine. Harry did this with a T-Rex.
* The form of Zombie creation done in Dead Beat (if I'm recalling correctly) was *bad* because the Necromancer was killing the victim, then trapping its soul in the dead body in a mockery of life. In some ways, this is maybe more of a 4th Law violation.
Personally the way I figure it is that with a zombie you are using a dead body. That dead body is a link to the person who used to be inhabiting it.
Additionally Quantus is right about necromantic energy being different from normal magic.
@Richard Chilton: Yes the white council doesnīt bother. But how cruel is it to force a feeling, intelligent being to fullfill you every wish. When you use magic for this, it should be some kind of "lesser lawbreaking", donīt you think?
Example 2: Wizard B is forcing a ghost to beat up an enemy of him. Since the ghost has no soul itīs not really a lawbreaking, but you also enthrall it and perhaps a part of the spell is using a tiny bit of death magic. As a GM I would state that he is about to walk a darker path and therefore his soul maybe stained a little bit. To simulate this in game terms: The GM rolls an attack with a desired strength. Lets say the GM thinks this is a minor staining and he sets a strength of 4. He rolls a 2 and therefore the attack has got as power of 6. The wizard may use his conviction (because he might believe it was necessary to send the ghost and for the greater good and so on) and his roll results in a 4. Therefore he got two shifts form the attack. This shifts are used to open up the stress track necromancy (or vice versa for another not quite lawbreaking). Perhaps it could be of the same length as the mental stress track, but it wonīt clear as fast. Maybe you may roll conviction against stress +2 or something to remove one point of stress every minor milestone. When the stress track is full you get your lawbreaking stunt.
First on: Thank you all for making productive comments and not yelling around, that my point of view is bullshit :-)