I think that you should post a new question instead of adding a response to the referred one as it's too broad, IMHO, because it's not about a specific web app while yours is.
On the other hand, the referred question should be closed for the reason mentioned above; it's not about a specific web app.
I very rarely pay attention to facebook. Today searching for frequent questions I found that are some tags / tag combination related to "facebook account recovery"
[facebook-account] currently returns 2 questions:
How do I delete my Facebook account? (the very first question of WebApps!)
How to recover Facebook account using email, not phone number