The NY Times reports that the four television networks are challenging the Constitutionality of the FCC indecency and profanity standards: TV Networks Sue to Challenge F.C.C.'s Indecency Penalties: "With no allies among either the Democrats or the Republicans on the Federal Communications Commission nor any significant ones in Congress, the four broadcast networks, joined by the Hearst-Argyle Television group of stations, embarked late last week on a low-risk strategy of turning to the courts."
See also Christopher M. Fairman, Ohio State Moritz College of Law, Fuck: "This Article is as simple and provocative as its title suggests: it explores the legal implications of the word fuck. The intersection of the word fuck and the law is examined in four major areas: First Amendment, broadcast regulation, sexual harassment, and education. The legal implications from the use of fuck vary greatly with the context."