There is a disturbing trend on the rise in churches and among believers lately. There are some who have even given it a name and call it a "ministry". I will neither credit them nor their so called ministry here by mention, because I find that within the pages of scripture it is a grievance to God. Suffice to say, as Christians we are admonished over and over in the Bible not to gossip, bear tales, bear false witness, or unjustifiably criticize others. As students of the Bible, and disciples of Christ, we know better. It is simply not to be done.
Romans 14:4 KJVS
 Who art thou that judgest another man's servant? to his own master he standeth or falleth. Yea, he shall be holden up: for God is able to make him stand.
Mark 9:38-39 KJVS
 And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us.  But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me.  For he that is not against us is on our part.
Luke 9:49 KJVS
 And John answered and said, Master, we saw one casting out devils in thy name; and we forbad him, because he followeth not with us.  And Jesus said unto him, Forbid him not: for he that is not against us is for us.
John 21:20-23 KJVS
 Then Peter, turning about, seeth the disciple whom Jesus loved following; which also leaned on his breast at supper, and said, Lord, which is he that betrayeth thee?  Peter seeing him saith to Jesus, Lord, and what shall this man do ?  Jesus saith unto him, If I will that he tarry till I come, what is that to thee? follow thou me.  Then went this saying abroad among the brethren, that that disciple should not die: yet Jesus said not unto him, He shall not die; but, If I will that he tarry till I come, what is that to thee?
Jude 1:8-9 KJVS
 Likewise also these filthy dreamers defile the flesh, despise dominion, and speak evil of dignities.  Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.