I hate riding around people using headphones. They can't hear me, even if I yell. They're oblivious to everyone around them. Who knows when they'll decide to rock out and fling their arms up in the air?
OMG, I have NEVER behaved like this. I am never oblivious to my surroundings - I keep my head up, my eyes on the road and check my mirror ALL the time. I see people LONG before I could ever hear them coming, from either direction...