It's never acceptable. Ever, ever.
not so much acceptable as just part of some people's personality.
Maybe some people shouldn't have that much pressure placed on them if that is how they react in those types of situations. It was bad enough that Suh got called for a questionable personal foul, but Pelini might as well have just given the Hokies the end zone by adding 15 more to it. Absolutely uncalled for and it is embarassing.
I had a youth basketball coach that got kicked out of games for arguing with refs. It didn't fire us up, it embarassed us.
This is a lot different than in baseball when the coach gets kicked out, he runs the game from the clubhouse and no harm no foul. This cost 15 yards in a crucial spot. I get the fact that Pelini is fiery, but so was Callahan. Most thought he was an embarassment to the program for "slashgate" and "f'ing hillbillies." But Pelini gets a pass from most because "he just wants to win so bad." That logic completely reaks of bullsh#t.