What does it mean when someone's fb user name?

What does it means when someone's fb user name disappear from your list and even when you go to check the messeges they sent it to you,you see the... Show More

Most Helpful Guy

  • They either blocked you or cancelled/deactivated their FB account. Since you can't view the messages they've sent you in the past, it sounds more like they deactivated/deleted their FB account

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