The other instance the game was over, though two parents were removed earlier.
We have a “No Tollerence Policy” that is posted, and everyone that signs up must agree to it to register their child. (Though I’m sure many don’t read it, not that this matters.)
Parents will act as badly as you let them.
If a parent called an umpire a F#ck:ng A$$h&le at our park he/she is headed for the parking lot.
Time would be called, the BOD Member would come to the field and the person would be told to leave. If necessary, the police would be called.
If you "take control" (eject a parent or two if/when necessary) early in the season word gets around and things get better.
We have "Code of Conduct" signs posted on our fields and they are enforced.
Again, don't let the inmates run the asylum.