I agree with what others have posted here. Go through the coaches, "coach I need you to get control of your fans" most times that works, coach usually never liked "that guy" anyway, other fans are usually tired of hearing it too so a lot of times they help out, "shut up so that the coach can go coach, I ain't paying him to keep track of you he should be coaching my daughter"
There are times when you can "get away" with what you did, but there are times where that will cause an even a bigger cluster. This dad went away problem solved, but the next one, or the one after that....trust me (I know you) some time in your future you will have a dad stand toe to toe with you through a fence. Once you start talking to them they feel free to talk even more and eventually they will get you backed into a corner. Especially when there are 4-5 of them that have been riding you, even 4 idiots can sometimes out whit 1 smart umpire when you get to slinging comments back and forth.
Bottom line is let coaches deal with it, then if it increases and they can't get control, those TD's live for that kind of stuff
let them have their fun throwing jacka$$ out. Bottom line we get paid to deal with inside the fence, players and coaches, let the other people (coaches/TD/ASA Rep/UIC) do their jobs and take care of dear old dad! Cause if your focusing on him it takes you out of your game and away from what you should be doing focusing on the inside the fence stuff.
Never forget the old saying....Never argue with an idiot they will just bring you down to their level and then beat you with experience.