On September 2, StopICE.net shared a video on its Instagram account naming and shaming a Border Patrol agent who had been spotted at recent immigration raids in greater Los Angeles.

To the soundtrack of Z-Ro’s “Crooked Officer,” the post includes a montage of photos of a uniformed Border Patrol agent, some with a gaiter over the bottom half of his face and others with his face uncovered. In one photo, a visible name badge reads “G. Simeon.”

“Let’s welcome Georgy Simeon to the wall of shame,” reads the caption posted by Long Beach Rapid Response, a community defense group and one of six Instagram accounts tagged as “collaborators” on the video, along with StopICE.net, which has nearly 500,000 subscribers signed up for its crowdsourced alerts about immigration raids around the country.

The day after the post about Simeon, the Department of Homeland Security sent an administrative subpoena to Meta, the parent company of Instagram, for information about StopICE.net’s account and others.

Despite clear protections under the First Amendment for photographing agents in public, the Trump administration has threatened to prosecute activists for “doxing” immigration officers. In May, ICE stormed a home in Irvine, California, in an effort to track down a man they accused of hanging posters with agents’ names and other information. Now DHS is trying to unmask accounts that dare to share the names of masked federal agents.

On Thursday, the developer behind StopICE.net, under the pseudonym “John Doe,” asked a court to block the subpoena, through a motion to quash filed in federal court in San Francisco by lawyers from Civil Liberties Defense Center.

The DHS subpoena was issued “without........

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