Now this is different than keeping quiet where unjustice is done, as they say "to show compassion to wicked is to oppress the righteous, and to pardon oppressors is to tyrannize the oppressed". But if you know someone's involved in a sin, please don't publicize it.
Kuri New-Yorkaan, o assi jaanda haan jee.. Care to post the link to Surah hujraat where it has mentioned what you are telling? I was inspiring all the guppies through my story which I saw through my own eyes in Pakistan. tussi sada character da assaination kar rahey o!