"Guys, I am not going to listen to you argues balls and strikes today. If you want to play today, keep quiet and play ball" always seems to work. When it doesn't, the first ejection usually takes care of the rest.

I agree that MSBL tends to be a bit whiney, but it is still game management that gets you through it looking good. If you can't manage it, you probably shouldn't be doing that "level" of ball until you learn how to manage it.