[Thoughtful,] And mages who haven't trained with you, but still use their magic for evil? --Although before I go on, I should ask: D'you envision this world being one entirely without templars, or anyone who's access to their skills and training?

Two wrongs don't ever make a right, serah. If I kill a man in self-defense, he's dead beyond help and redeeming, condemned to wander the Void until he's penitent enough to embrace Andraste's mercy. [That's an interesting bit of theology right there, but--] And in that I wronged him, even if in doing so I prevented many greater wrongs he'd have committed.

Though that's a digression from the point. I'm not convinced that any use of blood magic to overthrow the minds of others is ever legitimate, but that's something to be decided much later, I imagine.