I don’t know how? I don’t have much of a Meta account to speak of, only the one tied to my Quest and that is 2FA to an Authenticator app.

Don’t know how it would cause Meta’s auth to show me other peoples accounts. I looked up some of the people and they seem to be other devs. It obfuscates email addresses but most are in a format that’s not hard to figure out [name] @ [name domain.com]

Just more Meta sloppiness from what I can tell.