When my oldest was about 9 years old, she came in to talk to my wife and I, who were sitting in the living room. She was obviously upset and had been crying. She told us that she was worried about her little brother - who was "listening to rock music on a Sunday."
I went in to check on him - he was 7. He had found one of my old Night Ranger cassettes (yeah - I'm OLD) and was listening to it.
I had to try really hard not to laugh, as my daughter was so upset with the circumstances and was concerned about her little brother's eternal salvation.