First off, let me say that I am in my second year of umpiring. Secondly, let me add that I have been coaching high school baseball for 21 years. I want to give you a view from the coaches box first.
I wanted to begin umpiring to have a better understanding of what the umpire has to deal with. I have just completed my 26th year of teaching and coaching (been coaching basketball and football for all 26 years) and love the game and would like to eventually call HS ball. I can tell you that I have only been tossed one time and I deserved it. When I disagree with a call, I always stat my opinon, get blues view point, express my opinon once more and then walk away. I know that a continued act of stupidity by me will only have an effect on any close calls that I may need later on in the game. I have never had an umpire overturn a call nor would I expect it to happen. I have had the plate umpire confer with his partner due to one maybe being out of place but, if the don't change it - I live with it. I have watched a runner beat the tag due to the 1st base mans foot being a little off the bag but 20 years ago an umpire told me that his angle does not allow him to see the foot off the bag by an inch. I CAN LIVE WITH THAT! The one thing I have learned is not to be an ass about it. If an umpire ever tries to get an attitude with me, I just say, "I'm going to be professional about this since I need my job, how about you." Never been dumped for that.
Now from blues stand point.
In most calls you are only going to make 50% of the people happy. I have already heard, "Last game we played blue gave us that pitch" and I just keep my mouth shut and go on my way. I may not be perfect but, I try to be consistent each game. I have found a lot of coaches that know parts of the rules and don't want to hear the remainder of them. I have been guilty of that as a coach.
If you want to know who was calling the game, go to the league director since he should have a record of it from the booking secertary. NEVER EVER, EVER TAKE IT OFF THE FIELD! If the coach saw him in the parking lot, he should have let it alone. I can tell you that if an umpire, football or basketball official ever came up to me at my vehicle regarding something that happen in a game - he would probably get his ass kicked. I have an administrator, athletic director and Georgia High School Assocation that are all open for them to lodge a complaint. If I have a probably with them, I have their booking association and Georgia High School head of officials that I can contact.