I don't know. I would like to hope that is the case and yet I haven't seen evidence of it, at least in the people I know that were corrupted. 'Except Killian. He's a little bit better but he wasn't corrupted by magic. I think he may have just made a mistake.
Oh, good. I was trying to imagine how that would look and it did seem frightening. And, yes, they can be, just like any other beast. But I've met nice ones before.