Jas 3:2 For we all stumble in many things.
It's a dangerous thing for a Christian to go around threatening the wrath of God on another Christian. I can't prove this from Scripture, but my personal observation is that the accuser is usually more guilty that the person being accused.
God's Word teaches that He judges us by the standard we set. When we teach that the judgment of God on a Christian is a source of joy, and something to be rejoiced over publicly, we set a standard for God to use in dealing with us. Since none of us are what we ought to be, we are better off obeying the Scriptural commands to love one another, not to judge one another, and to forgive one another.