Our human relationships are like roads and rivers to other cities. Facebook, Twitter, and their ilk dare set up tollbooths and style themselves turnpikes. High time we abandon them.

Leave, also on grounds of integrity.

I'd just move on. I deleted mine in 2016, and rereturned mostly to use it as SSO for Instagram. The Instagram remains, but I can't sign into it because they nuked my Facebook account for being "inauthentic" -- I would have uploaded ID if given the chance, but was denied the opprotunbity.

When I was on Facebook, I never had a single issue -- I mostly used it to cross-post photos of landscapes and architecture and RSVP for events, so I don't think this is a scenario where they think I'm a spammer or troll returning to the site.

If I had $$$$$ I'd short their stock -- you can't make it ambiguous if your users can return and expect anyone to make the effort.

Also I'd be interested in the legal ramifications for EU users if this bug effects them -- I can't delete my Instagram now, because the FB SSO was summarily banned without human review. What happens when someone born in a country with more freedoms than the USA decides to file a GDPR complaint due to their algorithmic misfire?

Anyways OP, unless someone sees this on HN and reaches out as a PR gesture, there's probably not much you can do.