Geez-ol-petes, you guys certainly seem to have public entertainment confused with sports...
Just as NCAA Div 1 umpires are not going to call an IP for leaping, neither are the MLB umpires going to declare a forfeit for USC by the manager (or nealy anyone else short of a complete out-of-control melee involving the crowd).
Managers getting in the face of umpires is part of the MLB show, nothing more.
For a bit of historical perspective, check
Managers, umpires have throwback week
The unfortunate part is too many amateur players and their coaches (and fans) seem to think that behavior should be copied. And, you do occasionally have the truely insane managers in professional baseball who also lose sight of the fact that it is a show.