Hate speech online
Supreme Court
Wisconsin v. Mitchell, 508 U.S. 476 (1993)
R.A.V. v. City of St. Paul, 505 U.S. 377 (1992)
National Socialist Party v. Skokie, 432 U.S. 43 (1977)
Brandenburg v. Ohio, 395 U.S. 444 (1969)
Chaplinsky v. New Hampshire, 315 U.S. 568 (1942)
Other
Planned Parenthood of the Columbia/Willamette, Inc. v. American Coalition of Life Activists, 244 F.3d 1007 (9th Cir. 2001)