[nickrego]

In a standard game, I have informed coaches that if they did not get the crowd under control, I would stop the game, and they would have to continue it at a later date (all associations back us on this).

For a Tourney, unless the crowd was getting violent, I would not stop a game, or leave. I would however, inform the director before my next game of what was happening.

At some point though, you do have to consider safety, when deciding to continue a game with an unruly crowd. Just look at what happens at soccer & hockey games. Most parents are sitting around with lots of Road Rage built up in them, just waiting to get out.