"Typical Grand Forks". Sorry to burst your biased balloon but this is not a local problem. This is a national problem and, yes, even Fargo parents have been caught displaying 'hostile and abusive' behavior at their children's sports events.
I agree that it's disgusting when adults behave so badly. My suggestion? Have the arena/tournament managers remove those adults at the first sign of verbal or any abuse to other fans, players, referees, etc.!!
I'm sorry that this happened to her and I hope Mr. Provost's daughter keeps refering.