Jake Turner: A movie fan shared a thought about villains having lines they won't cross. In 'The Depart…

A movie fan shared a thought about villains having lines they won't cross. In 'The Departed,' crime boss Costello is a total monster, but there's a scene where he calls out child predators among the clergy. It doesn't make him good—he's still awful—but it shows even he has a limit. What's your favorite example of a bad guy drawing a line at something even worse?