Donald Trump’s war against a free press has extended into “the cyber,” where his followers at the Federal Communications Commission are intent on unwinding a vitally important free-speech protection that internet users won after years of organizing and effort.

To make matters worse, the Trump FCC is carrying out its quest to kill Net Neutrality in a distinctly undemocratic way — including banning some activists from ever attending the agency’s public meetings for the alleged infraction of demonstrating their support for open-internet protections. And that’s just one in a growing number of incidents in which the FCC has cracked down on the rights of people who support Net Neutrality.

During the monthly FCC meetings that have occurred since Trump FCC Chairman Ajit Pai took office, agency staff and security have denied the First Amendment freedoms of people and reporters attending the events, which are supposed to be open to the public. Pai’s agency has also violated protesters’ due-process rights.

In response to this escalated attack on the First Amendment, Free Press and Free Press Action Fund on Monday submitted a letter to the FCC’s general counsel demanding that the agency address these incidents, and explain its rationale for shutting up and shutting out Net Neutrality supporters who have come to its monthly public meetings. The letter details a series of incidents in which the federal agency and members of its security staff have silenced dissenting voices, manhandled a reporter and barred members of the public from its meetings.

During one incident, on the morning of March 23, 2017, two Free Press Action Fund members, Joe DeGeorge and David Combs, attempted to attend the FCC’s open meeting wearing plain white T-shirts that read “Protect Net Neutrality” in black letters. FCC security personnel informed the two that they would not be allowed to enter the public meeting room unless they removed the T-shirts or flipped them inside out to conceal their message.

“This was a clear-cut violation of Mr. DeGeorge’s and Mr. Combs’ constitutional right to free speech,” reads the letter. “The Supreme Court has repeatedly held that the First Amendment safeguards people’s rights to express their disagreement with government policies, even in limited public forums like the FCC meeting room.”