I think the best way to handle this situation is a pregame meeting with the white hat and coaches of both teams. Speech could go something like this:
"Alright gentlemen. During the course of the game, it is most likely inevitable that you will become unhappy or disagree with a call my crew makes. This is fine. You have the right to be upset or disagree. What you do not have the right to do is berate and personally attack myself or anyone on my crew. If you want to have a calm, rational discussion about why we made the decision we did, I and my crew are happy to oblige you time permitted.
If you, your coaching staff, or players resort to vulgar language or personal attacks here is what will happen. I will give you one warning and one only. 2nd offense is a UNS. 3rd offense is a UNS and the offending party will be ejected from the game. Are we clear? Do you have any questions? None? OK, let's have a great game."
Having given this speech, I think it's important to follow through in a few ways. One, you need to make sure your crew is instructed to never escalate the verbal confrontation. Two, If someone begins to question a call or the coach requests an explanation, make sure 2 or more of you are there to hear it. This allows for corroboration on the verbal abuse should it occur. Third, document what was said as best you can remember it for review by the supervisory. If you can produce evidence as to what was said, and this evidence is agreed to be vulgar in nature, you should never have a problem with your chapter backing you up.