How many innocent people could he have hurt with that stunt? He has no thoughts for anyone but himself. He could care less about what he does, he thinks he owns the world and doesn't have to suffer conquences. Besides, I imagine Richard figures he will be paying for the punches, but probably enjoyed every single one of them. Nascar won't stop Kyle or do anything to curtail his attitude, so guess Richard just flat got tired of it and took care of it himself.