Free speech carries with it some freedom to listen.

Warren E. Burger
Free speech is not for the faint of heart.

Nor is it for those who are easily offended, readily intimidated or who need everything wrapped in a neat and tidy bow. Free speech is often messy, foul-mouthed, obscene, intolerant, undignified, insensitive, cantankerous, bawdy and volatile.
While free speech can also be tender, tolerant, soft-spoken, sensitive and sweet, it is free speech’s hot-blooded alter ego—the wretched, brutal, beastly Mr. Hyde to its restrained, dignified and civil Dr. Jekyll—that tests the limits of our so-called egalitarian commitment to its broad-minded principles.
Unfortunately, our appreciation for a robust freedom of speech has worn thin over the years.
Many Americans have become fearfully polite, careful to avoid offense, and largely unwilling to be labeled intolerant, hateful, closed-minded or any of the other toxic labels that carry a badge of shame today. We’ve come to prize civility over freedom. Most of all, too many Americans, held hostage by their screen devices and the talking heads on television, have lost the ability to think critically.
Good post.  Read the rest at: Washinton's Blog

The Framers of the Constitution knew that free speech is the friend of change and revolution. But they also knew that it is always the deadliest enemy of tyranny.
Hugo Black
Moreover, even imminent danger cannot justify resort to prohibition of these functions essential to effective democracy unless the evil apprehended is relatively serious. Prohibition of free speech and assembly is a measure so stringent that it would be inappropriate as the means for averting a relatively trivial harm to society. A police measure may be unconstitutional merely because the remedy, although effective as means of protection, is unduly harsh or oppressive.
Whitney v. California
If liberty means anything at all, it means the right to tell people what they do not want to hear.
George Orwell.