Rel said:
Depends.
My own personal view is that very, very few actions are Evil, Good, Lawful, or Chaotic in and of themselves (casting aligned spells being one subset of those actions).
Accordingly, Torture - along with Rape - is one of the few things that is always, always an Evil act.
This doesn't mean that people who are Good cannot do it - merely that, when they set about doing it, they know and understand that, for a while, they are acting on the side of the Enemy.
Those who understand that what they have done is truly, morally wrong and hate that circumstances have forced them to such a juncture, where such a horrible decision had be made, remain Good.
Those who come to the realization that, hey, look how easily this solved all the problems, and I'd probably do it again if I had to, have begun their fall from Good.
In other words, those who are Evil are not insane. There are logical, believable, and defensible rationales for Evil thoughts, actions, and philosophies. Sometimes, Evil seems like the
right thing to do - and not in a cartoony, "My parents hate me so I'll blow up the world" fashion.