For some time now, the U.S. Supreme Court has placed little weight on the value of anonymous speech, especially in the campaign finance context. True, in McIntyre v. Ohio Elections Commission (1995), the Court struck down a state law prohibiting distributing anonymous campaign literature. But from Buckley v. Valeo (1976) onward, the Court has looked favorably on disclosure of campaign spending. Even Citizens United saw only one justice, Clarence Thomas, speak out in favor of anonymous speech.
Long-time First Amendment advocate Nat Hentoff raises some questions about limiting anonymous speech in this video. He praises Justice Thomas and recalls the importance of anonymous speech during the founding era.