The reason you were disabled from logging into your Facebook account is most likely due to one of the following reasons below:
- Someone from an unknown location or unknown country or even an unknown device tried to log in to your Facebook account. It can even be you that was using a different computer or device to log in.
- You sent too many messages to people in such a short time. Facebook has monitoring software that detects spam activity and automatically disables accounts.
- You are using multiple accounts. It is against Facebook rules to have multiple accounts.
What can you do to reactivate your account?
When this happens to me, all I do is just try logging in again and Facebook will have me verify my identity through various ways like matching up my friends faces. If you don’t see the option to enable your account again by verifying your identity, then you will have to get in touch with Facebook via their contact page. When Google detects suspicious logging from a different location, it will notify you of the attempted logging by an unknown person, but Google will not disable your account. Facebook should also do the same by just notifying you and not disabling your account.