A thoughtful article for parents from the Farmington (MN) Youth Hockey Association titled “When to Yell at Referees“. Consistent with the PCA framework thinking that parents’ primary role is to support the player.
Short answer: Never.
Good reminder for us all.
Yes, referees will definitely make mistakes, miss calls, or call the game more loosely / tightly than you might want. For parents there is no reason to speak to the referee. It is best to attend the game and support your team. Remember, these players [and referees] are learning.
The article is here – http://www.farmingtonhockey.org/news_article/show/601041?referrer_id=2024960