Our Govern+ment are preach those poisonous stuff to the kids all the time. Like sacrifice yourself to protect the library books. I don't see you argue about it.
Why you think these girl will be so naive to take Laozhong's word. He preach more than needed because he believe the girl's will just partially take what he preach. this is a pre-adjusted preach.
So, I think he is fine. Plus, the girls who can have chance to in-depth talk to Laozhong are all adult. I don't think he will talk to underage about how to leverage sex and money.
