DY: “I think you are still saying it wrong. Don’t say, “I don’t care about this aveirah”, say, “You’re wrong, it’s not an aveirah, it’s a mitzvah”.
DY: “You still need to ask a shailah how to tell people.”
Right. Both of those things were my point. Also, you have to make sure that you know for sure the person is a molester. Did you see it yourself or are you relying on hearsay? Even if you didn’t see it yourself, you would probably be allowed to say something, but it depends how reliable the source is. And how you have to phrase it might be different in that case.