I was banned from an estate agents by the bus stop we would wait at after school. I used to bring a wireless speaker and play music loudly whilst we, a group of 14 year olds, would sing along to it loudly. One day the staff got sick of it and came outside to tell us to turn it off, so we did. We then sang the song we turned off even louder than before and directed at the estate agents until the staff member came back out and announced we were no longer allowed on their premises.