Is it time to start calling out bad cyclists?

did you look around more?

do people ride with music at full volume or at a level where they can still hear what is going on and even maintain conversations with other cyclists?

Kind of, I looked when I wasn't carried away with my singing/rapping/toasting it was quiet enough that I could hear pretty much everything I normally can, even managed to sustain a 30 sec convo with my mates mum who was in a car.