HEADPHONES ARE A DANGER
Headphones allow wearers to focus intensely on what they are listening to. But for a driver or a pedestrian on the road, headphones can be a deadly distraction. When a driver is listening to music in the car stereo system, he or she is still able to hear an emergency siren, but with headphones he or she can't, similarly with a pedestrian. Therefore, your ability to respond to danger that is not immediately visible is blocked.
FUSI MASEDI, VIA EMAIL