I'll agree that morals exist, but they exist largely as things we indoctrinate children to believe without question. I'm not saying that it's a bad thing (or a good thing). I'm saying it's not a useful method to change an adult's behavior.
I disagree. I think the only thing that really changes adult behavior is showing them that their behavior violates moral standards that they agree with. (Well, or that it's financially better for them to change...)