An ex-Facebook executive sat in silence during a panel discussion about her tell-all book about the social media giant because of ongoing legal action by her former bosses at Meta.
New Zealand-born Sarah Wynn-Williams was introduced as "an author in a hostage situation" at the Hay Festival, Powys, on Sunday.
She is under threat of further legal by Meta if she does anything to promote her book, Careless People, explained investigative journalist Carole Cadwalladr.
Meta denied trying to "silence" Wynn-Williams or restrict her freedom of speech, adding an interim order prohibited her from book promotion.
Cadwalladr read part of a letter from Wynn-Williams' lawyer, explaining their understanding of her legal predicament.
"Meta obtained a temporary order preventing Ms Wynn-Williams from promoting her book or speaking about certain topics regardless of whether what she says is true," it said.
Cadwalladr appeared with Wynn-Williams and academic Tim Wu at the event.
Wynn-Williams is one of the most senior former Meta executives to speak about Mark Zuckerberg.
Wu called the lawsuit a "machine reaction, not a personal vendetta".
He accused Meta of "maximising the punishment" as a warning to any other would-be Meta whistleblowers.
"This is performative," said Cadwalladr.
Wu, a professor at Columbia University in New York, who was involved in the Obama and Biden administrations, called it "censorship".
"This is the age of private censorship, this is the assertion of power, a demonstration that some of the worst abuses in our society are not confined to kings, emperors, governments… but to a class of companies that have assumed the sort of sovereign effect and seek to assert their power the same way that despotic nations do."
Meta said the assertion it was restricting Wynn-Williams' freedom of speech or trying to silence her "is not what's happening here".
"There is a binding interim arbitration award against Ms Wynn-Williams which she agreed to during her time at Meta and which explicitly prohibits her from promoting her book," it said.
"This is an arbitrator's order, not Meta deciding to silence anyone.
"We are entitled to ask that the terms of that order be observed."
In 2021, Facebook changed its corporate name to Meta as part of a major rebrand.
Meta owns Facebook, Instagram and WhatsApp.
It followed a series of negative stories about Facebook, but boss Mark Zuckerberg said the name change was part of a plan to build a "metaverse" – an online world where people can game, work and communicate in a virtual environment, often using VR headsets.
It is based in Menlo Park, California.
Mənbə: BBC News
