I also am annoyed by most of the people that think I want to hear their music while I am enjoying a round of disc golf. I love music, loud music, and most types of music. However, when I'm playing disc golf, I would rather enjoy the outdoor sounds than the tinny second hand sounds coming from someone's golf bag.
The music may sound good to the person or group carrying the music, but to the others on the course it is usually just annoying background noise. What might be your casual round, might be another group's competitive money round....or another casual round where they don't want to listen to country music in fear of starting a fight within their group.
Have you ever gone to the beach with the family and had a group set up next to you and crank up their boombox so everyone in the area has to hear it? At least on the beach you can pack up and move. On a DG course this group just follows you around.
And Toby, don't be dissin on my Lionel Richie and Barry Manilow tapes. If I could find a portable 8-track player for my disc golf bag you could be enjoying this with me during my next round at NorthPark. I get my ass kicked at Lake Stevens for playing this, but I think I could get away with it there....