Rather than call people out on their behavior, New Testament prophecy calls people up into their true identity in Christ. We speak to who people are and are becoming, not who they are not.
If the Holy Spirit shares a negative with us, that is privileged information for us only, so that we can ask the Father, "What do you want to be for them instead?" That's the only thing we prophesy.
This episode contains the classic story, "Give Me Back My Stuff."