Well his ex wife doesn't really give a shit about discipline. She actually let her 6 year old ride his bike by one of the busiest streets in their neighborhood. Her excuse, I didn't know where he was. How the fuck do you not pay attention to a 6 year old? It is your son.
My dad will let his two do whatever they want, and then if he's in a bad mood, he'll yell at them. His only way of disciplining is yelling, and it doesn't work.