Yasir Qadhi wrote on his Facebook page

"The Prophet (salla Allahu alayhi wa sallam) said, "O you who have believed with your tongues, yet faith has not yet entered your hearts! Do not backbite the believers (one version adds: nor irritate them, nor smear them), nor expose their hidden faults. For the one who exposes the faults of others shall be exposed by Allah Himself, and the one whom Allah exposes shall be exposed (i.e., humiliated) even if [he seeks shelter] in his own house." Reported by Abu Dawud and others.

This is a stern warning to those people who revel in slandering others and speaking about others. There are those whose claim to fame is merely in talking about other people and 'exposing' them. Yet, we see over and over again how Allah humiliates such people in this world, and still the punishment of the next awaits if they do not repent.

Be careful, O Muslims, of using your tongue to harm other believers or slander them. And to err on the side of caution, and be silent about other people, is always better and safer. "From the perfection of one's faith is to leave that which does not concern him."

O Allah! I seek refuge in Your Majestic Names and Perfect Attributes from humiliation in this world, and from punishment in the next."

Response to this post
' I wholeheartedly agree and this is an extremely important message for us all to hear from our leaders. But when someone who causes *clear* harm to the Muslims does evil in public for the whole world to see and that is cited to discredit them so that they can harm the Muslims no further, that is not exposing them. They exposed themselves.'

Yasir Qadhi replied
" It is not my methodology to mention people by name or specifically indicate a person while criticizing. Nevertheless there are always exceptions to every rule !

I believe this individual you (indirectly) reference is a perfect example of someone being humiliated after having attempted to humiliate others. In other words, the purpose of the post was not to defend this individual, but for us to take a lesson from him and his humiliation. Those who strive the most to harm believers and shame them will eventually be harmed and shamed by Allah; and I ask Allah for His protection and blessings."