Once, only once I was on a playing field where a "view fans" misbehaved. Thet didn't insult me or my partner but a collourd female player, who used to play for them. She hammered lots of balls over the fence in their favor and now did it for the opponent...
When it real got out of hand, I just simply bluffed my out of it. Streching the rules we play by. I had the coach, from the team those fans were chearing for, asked over for a chat. I informed her that if those 4 individuals didn't watch the rest of the game from their canteen (no sight on the field possible), I was forced to end the game. It would be a regular loss for their team...
Since that team needed only 2 points to secure the play-offs this coach (not knowing the rules, nor understanding that I was bending the rules) immediatly send away those men.
After the game, when the men offered me a peace-pint she again directed them away from me and my partner. I still love the angry face she turned on, towards those men
I've never told her that I was completely out of line in my request and threatning...