Chris Hughes one of many former Facebook insiders turned critics

Since then, McNamee has published an entire book on the subject titled “Zucked: Waking Up to the Facebook Catastrophe,” and he has routinely criticized the social network during marketing events for the book, calling the company “a threat to democracy.”

Brian Acton, WhatsApp co-founder, left Facebook in September 2017 after selling his startup to the social network in 2014 for $19 billion. After his departure, Acton contributed $50 million to the Signal Foundation, the organization that builds and maintains Signal, an encrypted messaging app that is an alternative to WhatsApp.

Acton has also been vocal in his denunciations of Facebook. Following the Cambridge Analytica scandal in March 2018, Acton tweeted #deletefacebook. He has since spoken out about his decision to leave, saying Facebook’s decision to start building targeted ads into WhatsApp made him unhappy.

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Tim Kendall, director of monetization, hasn’t said many harsh words about Facebook, but his actions speak loudly. A year ago, Kendall spent $7 million to fund Moment, his startup that helps smartphone users better manage the time they spend on social media and their devices.

Kendall told the Wall Street Journal in November that he regretted not foreseeing how bad actors could exploit Facebook.

“I feel a little guilty about not anticipating some of the ramifications, even though I think that would have been really hard,” he said. Kendall, however, added that he remains confident in Zuckerberg’s ability to fix Facebook.

Mark Luckie, strategic partner manager for influencers, spoke out against Facebook after leaving the company in November. Luckie, a black man, sharply criticized the company in a Facebook post for its lack of diversity, saying Facebook had “a black people problem.”

Among his criticisms, Luckie said black Facebook users often find their content removed without notice. Ironically, Facebook suddenly removed Luckie’s post on the topic before allowing it back on later.

Alex Stamos, chief security officer, is perhaps the most frequent critic among Facebook’s former executives. Since leaving the company in August, Stamos has compared Facebook’s culture to that of “Game of Thrones,” and he has called Facebook’s pivot to privacy a decision to punt on issues the company doesn’t want to deal with. Stamos is often willing to share his thoughts on his former employer, but they are not always criticisms — he has often gone to bat for the company.

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