Ex Military.
You screw up, your whole group pays the price.
Why? Because you should keep each other in line AND consider how your actions will affect others. Case in point: You like to blare your music. Nobody else in your group minds, but this is a violation of regulations. You’re deployed in a combat zone, and continue to blare your music. The enemy can hear your noise at night and uses it to pinpoint your location and shells your camp, killing most of your group. You survive, but have to live with the knowledge you were responsible for this because you can’t follow regulations.
Had your entire group been punished before this, at least one of them may have had the sense to say: “Turn that down before it gives away our position.”