Facebook introduces 'unfollow' button...
Facebook has replaced its Hide All button with a more to-the-point ‘Unfollow,’ letting users block all messages and posts from selected friends.
Like the previous button, it gives users the option of blocking content from certain people without offending them, say through de-friending.
The latter alternative severs ties with that person on the social network, without notifying them. This new one allows for more passive aggression.