En línea con el viejo cuento de las tres rejas, les dejo el Sutta Aranavibhanga (MN 139), que invita a reflexionar un poco sobre si decir algo o no:
When one knows overt sharp speech to be untrue, incorrect and unbeneficial, one should on no account utter it. When one knows overt sharp speech to be true, correct and unbeneficial, on should try not to utter it. But when one knows overt sharp speech to be true, correct and beneficial, one may utter it, knowing the time to do so.
FDV