This should be handled at a school or league level, though. I'll defer to the expert on this one, but I'm pretty sure refs already have the authority to call a technical foul or call off a contest when the crowd becomes too disruptive or unruly.
Interesting is the reasoning provided by the WIAA director:
The association director Mike Colbrese blames rude fans for the dwindling number of people who want to be coaches and officials.Hmm... again, I'll ask the expert for comment, but I'd guess that labyrinthine regulations, pressure from high-powered parents, hyperlitigiousness, crappy pay, administrative tangles, and sore knees are bigger factors than fan follies.
Update: Steve Kelley is anti-ban.