You are to rebuke in the spirit of gentleness (Gal 6:1). A rebuke is not meant to be harsh, mean or offensive. It is to teach the sinner his sin, and hopes he comes back to God. You rebuke someone because you love them.
What is interesting is how the subject of rebuking was even brought up in this thread. When I was discussing with you how I have to play the mother and father role in my sons life due to the abandonment of my sons father you found out my son is a result of fornication. The subject immediately went from discussing the welfare of a child to rebuking. You never asked if I repented, but automatically assumed by your comments that I did not. You would not have known that my sin had been forgiven if it wasn't for me volunteering the information.
While your thread topic is one I do 100% agree with I can't help but question your motives here. Are you here to help people, and encourage or are you here to point fingers? You then tell someone they do not know scripture when they were trying to help you understand.
Jesus did not rebuke the woman who was about to be stoned to death for a sexual sin. He did not condemn her either. He told her to "go and sin no more". He was not harsh, and he was not offensive.
We don't become Christians so we can offend people.
Prov 11:17 A man who is kind benefits himself, but a cruel man hurts himself.
1 Cor 13:4-7 Love is patient and kind; love does not envy or boast; it is not arrogant or rude. It does not insist on its own way; it is not irritable or resentful; it does not rejoice at wrongdoing, but rejoices with the truth. Love bears all things, believes all things, hopes all things, endures all things
Phillippians 2 So if there is any encouragement in Christ, any comfort from love, any participation in the Spirit, any affection and sympathy, complete my joy by being of the same mind, having the same love, being in full accord and of one mind. Do nothing from rivalry or conceit, but in humility count others more significant than yourselves. Let each of you look not only to his own interests, but also to the interests of others. Have this mind among yourselves, which is yours in Christ Jesus, ...
1 Peter 4:8 Love covers a multitude of sins