The owners of a private campground I camp at told me they had a complaint about music being played from my camp site. The campground had signs on the way in that had camp rules on them. One said "NO MUSIC". This particular site was back into the trees from the road and away from the clearing the other sites surrounded. There is no way that anyone outside our camp could here the music at the volume I had the radio. I think I know who complained. We had a visitor that was curious about our site and how we had set everything up. He was very friendly and had asked about the radio.
Later the owners stopped in to have some food and drinks with us. I still had the radio on. He said the guy was just being an @$$.
