Several people in my Facebook friends list come up as having deactivated accounts when I try to click on them from the friends list. However, when searching for them by name, they come up with blank profile pictures and no add friend button. What does this mean?
When a user deactivates their Facebook account, much of their data is hidden from public view. So while you may still see their name in your friends list, their profile picture will be blank and most of their information will probably be gone (at least, from your view). You cannot send a friend request to a deactivated account.