Maybe rage is a symptom of poorly management of stress and negative emotions? Cars do not cause road rage. People who throw childish temper tantrums is not controlled by the activity, be that driving, gameing, cooking, gambling, fishing, cleaning, sports, constructing, knitting, (so far all places where I have seen rage) or what have you. Childish temper tantrums occurs in all places where people are, and especially places where people who struggle emotionally may go to, and where they might be stressed or be impacted by a negative event.