I disagree. In the 1980's Texas was still a Democratic Party state, but no one really knew that a revolution was coming.
...at least, they didn't know it until the Cotton Bowl one year when Democratic Governor Mark White decided to walk onto the field to give a partisan speech.
He was booed, heckled, and shouted off the field. Texan after Texan looked around, amazed that everyone else felt like they did, disgusted by the liberal-left politics of the state's Democrats.
You see, the liberal newspapers hadn't been revealing just how much sentiment was against the various uber-liberal state funding/school-spending and general Democratic Party nonsense that was going on.
But at that one massively public event, tens of thousands of Texans suddenly realized that they weren't alone...and so too did millions in the TV audience.
It was a watershed event. It led directly to Republican control of the entire state in a brief amount of time.
Silence would not have accomplished that feat.
It was a spontaneous, grass-roots expression in the most public of forums (i.e. packed football stadium and big TV audience) that changed the course of history.
It surprised everyone simply because the shift (or rise) in anger towards the Democrats hadn't been reported. The media had censored that news...but all of a sudden the cat was out of the bag, never to be returned to its old dark state.
Likewise, the anger against left-wing PC nonsense on college campuses is being censored. It will take these sorts of shout-downs to break that information bottleneck, get the word out, and hasten the Rightward shift that must inevitably occur there.