Reply To: Hilchos Shmiras Haloshon

ADMONISHING THE SPEAKER:

The Commandment ???? ????? ?? ????? You shall reprove your fellow (Vayikra 19:17) requires a Jew to inform a sinner that his behavior is improper, and attempt to convince him to mend his ways. In voicing his disapproval, one must be prepared to endure embarrassment and insult and should continue to voice his disapproval so long as the forbidden act is being repeated. Even if one sees little or no chance that his words will be heeded, he must nevertheless continue to protest. Only is a case where one knows that his reproof would cause the sinner to react by committing more serious offenses is he to refrain from speaking up.

(ibid, Day 93).