jer166 wroteAs a coach also, I never realized how ignorant most coaches are of the actual rules of the game until I began to officiate.
The problem is that coaches truly believe that they know the rules. That's why they get so upset. It's because they really are sure that you missed the rule.
I was in a class for teaching the rules to people who wanted to become referees. Lots of former players and coaches in the class. After the first hour of the class, they took a break and I overheard a coach tell the instructor, "Man, I've been a real jerk for the last 6 years."
After just one hour, he realized that he really had NO IDEA of what the rules were. But they're all SURE that they know them better than we do.