Racecar drivers are some of the worst offenders and worst drivers on the road...
One time driving through Golden Gate Park in SF, I was in my 67 Fastback Mustang, and I was taking up all 3 lanes as I fishtailed through there. A cop had seen me take off from the light racing my buddy. When he caught up to me he said, "I know you can handle your car! But it's the other people I'm worried about that may panic when they see you driving like that and then they cause an accident."
While the NASCAR driver may seem like one of the "worst drivers on the road," it's not him per se, but the reaction of the other drivers in relation to him.