Eugene Volokh has an awesome site where he discusses what I think is the biggest threat to free speech in our country--sex harassment law. The newest move by the federal government is to mandate speech controls in all universities.
Among the forms of expression now punishable on America's campuses by order of the federal government are:
• Any expression related to sexual topics that offends any person. This leaves a wide range of expressive activity—a campus performance of "The Vagina Monologues," a presentation on safe sex practices, a debate about sexual morality, a discussion of gay marriage, or a classroom lecture on Vladimir Nabokov's Lolita—subject to discipline.
• Any sexually themed joke overheard by any person who finds that joke offensive for any reason.
• Any request for dates or any flirtation that is not welcomed by the recipient of such a request or flirtation.