Agree Never. Quite possibly, this is the cruelest thing that you could do to someone. Particularly when you don't understand it or only know part of the truth (at best), anyway. Let people live; let people learn.
Inner peace begins the moment you choose not to allow another person or event to control your emotions. Always take a moment to stop, breathe, and think to yourself "I can choose peace, rather than this." Always choose peace.