- Facebook launched a tool claiming to clear your history — that didn't actually delete anything.
<https://www.theguardian.com/technology/2019/aug/20/facebook-launches-clear-history-tool-but-it-wont-delete-anything>
- Facebook kept shadow profiles, data about people who had never signed up for Facebook or used the product. They probably still do.
<https://www.theverge.com/2018/4/11/17225482/facebook-shadow-profiles-zuckerberg-congress-data-privacy>
- Facebook stated that you have no expectation of privacy on social media.
<https://www.cnet.com/news/privacy/facebook-reportedly-thinks-theres-no-expectation-of-privacy-on-social-media/>
- Facebook uploaded 1.5m people's address books without permission, and claimed it was an accident.
<https://www.businessinsider.com/facebook-uploaded-1-5-million-users-email-contacts-without-permission-2019-4>
- Facebook paid kids to install spyware on their phones.
<https://techcrunch.com/2019/01/29/facebook-project-atlas/>
So, after all that you want to trust Facebook this time? That's up to you. I'm not going to tell you what to do, but I don't believe Facebook will genuinely federate, and if they do then I sure as hell don't believe they'll moderate acceptably.