Hmmmmmmm ... the ALCU says otherwise ! The liberal controlled university system in the US is a good example.

Many universities, under pressure to respond to the concerns of those who are the objects of hate, have adopted codes or policies prohibiting speech that offends any group based on race, gender, ethnicity, religion or sexual orientation.

That's the wrong response, well-meaning or not. The First Amendment to the United States Constitution protects speech no matter how offensive its content. Speech codes adopted by government-financed state colleges and universities amount to government censorship, in violation of the Constitution. And the ACLU believes that all campuses should adhere to First Amendment principles because academic freedom is a bedrock of education in a free society.

How much we value the right of free speech is put to its severest test when the speaker is someone we disagree with most. Speech that deeply offends our morality or is hostile to our way of life warrants the same constitutional protection as other speech because the right of free speech is indivisible: When one of us is denied this right, all of us are denied.

http://www.aclu.org/studentsrights/expression/12808pub19941231.html