I will make an admission here and surely some posting here were "That guy" at least one time in their time camping. Early on in our beginning days of camping with our new trailer we were at our 'home' resort. It has a grill and Putt Putt and playground and all that good stuff. The grill has music on all day and it's piped to the Putt Putt area too. One night we went to bed and I could hear music very faintly. I got up and stuck my head out the door and it appeared to be coming from the grill area. I called security to have them check. Went back to bed and never did hear from security but still was able to go to sleep.
I got up the next morning and went out to fix breakfast and I could hear music. I went to the outdoor speaker on the trailer and sure enough, the radio was on, the outdoor speaker was on and THAT was the source of the music all night. I apologized to my neighbor when I saw them but he said they never heard anything. It was very low volume so Thank goodness we were the only ones who really heard it.
We've all done something I would bet that made us "that" guy at least once.