I'm sure someone has posted this, but none of those sites permanently remove EVERYTHING. And with government home security it may now be against the law to remove anything publicly posted to the sites.
In most cases, when they say your data is permanently deleted, they mean you permanently won't be able to access it ever again. However, they and the government will always have access. All your data is in backup systems.
Deactivating or Deleting Your Account
What's the difference between deactivating and deleting my account?
If you deactivate your account:
You can reactivate whenever you want.
People can't see your timeline or search for you.
Some information may remain visible to others (example: messages you sent).
If you delete your account:
You can't regain access once it's deleted.
We delay deletion a few days after it's requested. A deletion request is cancelled if you log back into your Facebook account during this time.
It may take up to 90 days to delete data stored in backup systems. Your information isn't accessible on Facebook during this time.
Some information, such as messaging history, isn't stored in your account. This means friends may still have access to messages you sent after your account has been deleted.
Copies of some material (example: log records) may remain in our database but are disassociated from personal identifiers.
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How do I temporarily deactivate my Facebook account?
I deactivated my account. How do I reactivate it?
How do I permanently delete my Facebook account?
What happens if I permanently delete my Facebook account?
You won't be able to reactivate your account.
Your profile, photos, posts, videos, and everything else you've added will be permanently deleted. You won't be able to retrieve anything you've added.
You'll no longer be able to use Facebook Messenger.
You won't be able to use Facebook Login for other apps you may have signed up for with your Facebook account, like Spotify or Pinterest. You may need to contact the apps and websites to recover those accounts.
Some information, like messages you sent to friends, may still be visible to them after you delete your account. Copies of messages you have sent are stored in your friends' inboxes.
