Re:DeleteFB: Selenium script to delete all of your Facebook ...
by BinaryIdiot on Monday May 20, 2019 @07:02PM
(#19966130)
Reddit doesn't actually store the history of your edits, only that you edited it (which is why, when you scrub reddit history, people recommend editing it because then your posting is gone except for say a backup). Facebook, however, allows you to see the history of posts so if someone edits it you can see what they originally posted.
I don't think editing a Facebook post first would have the desired effect.
However at Facebook's size, and given they're known for 0 privacy, they likely track all changes anyway.