Really? Not even during Vietnam war? Not even during Occupy? I don't buy this. I think what is happening is that those in power are getting pushback and now they are complaining about the loss of free speech. The reality is speech was suppressed for a long long time at Universities, but since the people who lost the speech didn't have any power (think communists, anarchists, people promoting black rights, women's rights, etc) it seemed all was well in University land.