I'm surprised they would have high school kids ref games, even 6th grade girls games. I've done some reffing and I'd rather do a high school freshman game than a 6th grade game any day! Kids at that age, if not very good, are just out of control. You could call a foul or violation on every possession if you really wanted to. I wouldn't blame the kid ref at all. One, he is probably in over his head to begin with, and two, 6th grade girls games usually turn into rugby matches, no matter how well officiated.
You are absolutely right. The parents and the kids take their cues from the coaches. If the coaches are making asses of themselves, the parents will start yelling and screaming over every single call. It is ridiculous. And it goes the other way...if the coaches are calm and respectful, the parents will be as well.
There are two major problems here. One is the fact that coaches and parents take these games like its the state finals. They scream "travel", "foul", "where's the over the back", "3 seconds" all game long and don't put an equal amount of effort in praising their teams. Now not all teams are this way but when a coach begins "begging" for calls it spreads to the fans very quickly. #2 and this is where all the problems begin is that these schools/coaches put these young players in the mix of reffing these games without proper training or some sort of knowledge of how to officiate a game. Just because you can play the game doesn't mean that you can officiate. Heck I love to eat but that doesn't mean I am going to walk into a restraurant and know how to cook. They will usually ask players to show up and ref. The players are unsure about how to call a game and will at times not call something that causes a parent/coach to start complaining. Plus where is the game administrator watching this game? If he is going to use high school students to ref these games then he better have his butt in the gym watching the game to either settling down the coach or during time outs give some advice to the refs about how to "call" the game. Now Scott Larson's actions are completely uncalled for and I'm not tossing the blame elsewhere but just speaking through my experiences in that these situations can be prevented other ways.