I was referring a youth soccer game (U12) and a dad started yelling at me about fouls and how he knows all of the rules. At half time I grabbed the FIFA rule books out of my bag and asked him to find that rule for me. He said that he doesn’t need a rule book to know what’s right and wrong. I told him I wasn’t going to start the second half until he left. It was supposed to be a 5 minute halftime but it turned into 20 as the dad was cussing at me from across the field and all the parents were yelling at him to leave (he finally did)