Writer's Almanac: (h/t Pastor Dan)

It was on this day in 1988 that the Supreme Court issued an important decision in the history of satire in the case of Hustler Magazine v. Jerry Falwell. The court ruled that satire of a public figure - no matter how vulgar, insulting, or even false - is protected by the First Amendment. 

The Quotations Page:

I disapprove of what you say, but I will defend to the death your right to say it.

Voltaire, (Attributed)
French author, humanist, rationalist, & satirist (1694 - 1778)