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Elon Musk's fight defending X's content moderation decisions isn't just with hate speech researchers and advertisers. He has also long been battling regulators, and this week, he seemed positioned to secure a potentially big win in California, where he's hoping to permanently block a law that he claims unconstitutionally forces his platform to justify its judgment calls.

At a hearing Wednesday, three judges in the 9th US Circuit Court of Appeals seemed inclined to agree with Musk that a California law requiring disclosures from social media companies that clearly explain their content moderation choices likely violates the First Amendment.

Passed in 2022, AB-587 forces platforms like X to submit a "terms of service report" detailing how they moderate several categories of controversial content. Those categories include hate speech or racism, extremism or radicalization, disinformation or misinformation, harassment, and foreign political interference, which X's lawyer, Joel Kurtzberg, told judges yesterday "are the most controversial categories of so-called awful but lawful speech."

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This week, Meta asked a US district court in California to toss a lawsuit filed by a professor, Ethan Zuckerman, who fears that Meta will sue him if he releases a tool that would give Facebook users an automated way to easily remove all content from their feeds.

Zuckerman has alleged that the imminent threat of a lawsuit from Meta has prevented him from releasing Unfollow Everything 2.0, suggesting that a cease-and-desist letter sent to the creator of the original Unfollow Everything substantiates his fears.

He's hoping the court will find that either releasing his tool would not breach Facebook's terms of use—which prevent "accessing or collecting data from Facebook 'using automated means'"—or that those terms conflict with public policy. Among laws that Facebook's terms allegedly conflict with are the First Amendment, section 230 of the Communications Decency Act, the Computer Fraud and Abuse Act (CFAA), as well as California’s Computer Data Access and Fraud Act (CDAFA) and state privacy laws.