It might be a hassle, but taking this step further will probably be the rightful thing to do
Here is a list of apps, websites or programs with 2FA (Two-factor authentication) to help lessen your chance of intrusive login attempts.
Links to setup instructions
To enable two-step verification, open WhatsApp > Settings > Account > Two-step verification > Enable.
Go to your Security and Login Settings by clicking the downwards arrow in the top-right corner of Facebook and clicking Settings > Security and Login.
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