I don't think there are satanic messages in Rock music but apparently the Catholic Church officially does. Vatican's Rome university, the Athenaeum Pontificium Regina Apostolorum is now offering exorcism training.

The 10-week course includes sessions in exorcism rites, how to talk to the Devil, the tricks he uses to fight back and signs of the occult hidden in rock music and video games.

Video games too? I need to expand my website.

Update: Plastic has an interesting writeup on this article.