I listen to music when I play COD. Every now and then I might have everything silent so I can listen for the most minute of sounds through my headset, but it gets boring and I need music.
So, in your opinion:
1. Is music or any noise a no-no and best avoided during gameplay?
2. It's ok as long as it doesn't cause feedback on mic or affect your ability to play.
3. I should be ashamed for even listening to anything other than what the music composers of BO2 worked so hard to create.