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. (Those are not my words but well said.
"The moment you feel like you have to prove your worth to someone is the moment to ABSOLUTELY and utterly walk away." ~ Alysia Harris (Even though I've been heart broken ever sense I broke up with (him) it was the bet thing I ever done to help me) ~Ness~