Correcting evil . . .
Horse of a different color? Another Wizard reference? I have a feeling you enjoy reading the Oz books.
One day, we may have the ability to correct evil, as a form of corrective action, and, for the incurably insane, we may choose this measure. A frightening path, for, doing so opens for us yet another ethics doorway.
Should we go there?
Proceeding along this course creates a new form of -- dare I say it? -- evil weapon, a machine that could be turned upon any chosen victim, driving him/her down that dark, twisting spiral to insanity, to become criminally insane, possibly within the span of a very few hours.
...Or not...