More than once over the years I've told my players to chill out. The first meeting of the year for the one's that don't know I tell them:

a) I also umpire;
b) I know the rules better than they do;
c) Any discussions with the umpire will be by me only;
d) One call doesn't decide the game if they do what they are supposed to do;
e) Accept the call and move on; and last
f) I will chew their butts out if they even think about arguing a call - I have and I will and they know it.