I began officiating in 2005 and started as a HL and later moved to LJ on my current crew (I am the U now). Way back when I first started I had some young right out of college assistant coach just wearing me out on calls that were made and calls that were not made. One of the chain crew members asked me how I took all of that verbal abuse. I quickly explained that I had spent over two decades in law enforcement and while a co, I had a way to deal with individuals when they "crossed the line" (i.e. handcuff and arrest them).
I further explained that as an official, I have a way to deal with coaches who "cross the line" and I gently pulled on my flag. This young coach, for the most part, was just mouthing and most likely trying impress either his head coach or someone in the stands, so I let him rant and rant. Of course, since I only communicated with the head coach (or his designated coordinators), I essentially ignored this mouthy coach.
At least until he eventually "crossed the line" and his comments became vulgar and "personal." The first time it was 15 against his team. His head coach quickly ripped him a new one and I never heard another thing from him. The next year, our crew had that same team and when I asked the HC where my friend was at (as I did not see him on the field during pre-game warmups), I learned that he was "no longer employed" with their school.
I guess my point is that we must remember (as another official stated earlier), let it e like water off of a duck's back!