The indignation on their faces warmed her. Horror and rage crossed every face. "That stupid short sighted fool." exploded Snape. "Those spells drive the master to indifference at best, and at worst negligent dislike. Unless broken the victim is sure to live and die in misery, never knowing what they did to make someone hate them so. Even worse, it encourages others to ignore the suffering. The victim becomes an afterthought."