For those of you who know the daily joy of regional rail, a quick question.You board a Friday afternoon rush hour train for a 40-minute trip. The AC is off, and the car is 80% filled. The train is late, and your mood is not great.You pass by a white male in a blue striped polo shirt and aviator sunglasses who is taking up two seats up curling up in the fetal position to snooze. On the other end of the car, a black woman is having an energetic conversation on her cell phone about the failure o...