Facebook’s policies on disabling or deleting hacked, unused or unconfirmed accounts.

Removing hacked, unused, or unconfirmed accounts helps reduce the amount of potential abuse on our platform and protects the privacy, integrity and security of your data and your account.
We may disable or delete your account if it appears to have been hacked or compromised and we are unable to confirm ownership of the account after a year, or if the account is unused and remains inactive for an extended period of time. Additionally, if you do not confirm your account after registration, we may disable or delete your account after one year of inactivity.
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