@ehBeth,
You know -- the funny thing is the kids are rarely the problem. Many of the kids know each other to a certain degree and talk after the game. Often times they get to know each other simply over competing over 4 years or more.
To me it would be more an issue if it was a younger child - the youngest group that competes is 9 and 10 year olds. My 14 year old knew that the adult was acting like an idiot so she found it more amusing than anything - although when I told her she could be banned from playoffs - my daughter said good.
Just imagine having a couple of 13/14 year olds laughing at you as an adult because you were saying something that they know better than to do.
We even had a situation where one of the coaches got a technical foul because he kept mouthing off to the ref after being warned several times. My daughter got called by her coach to go to the free throw line - didn't know why but sank the two - the coach then could only sit and couldn't talk to his team unless he called a time out - what the heck are you teaching your team with this behavior. It was worth it just to make his sh*t his mouth.