The league refs can't do anything about the crowd but they can about players and most of the time they don't which is the behaviour that filters down to grassroots players and how they believe they can get away with the same behaviour.
There is a massive difference between criticising well paid professional officials when they make glaring mistakes and giving a 14 year old an abysmal time when he is just starting out and learning the job. I have a lot of time for grassroots officials (I coached a girls team for nearly 10...