Yes Facebook did add that feature... last year. Engadget is simply reporting on something Facebook announced they added publicly last year. https://newsroom.fb.com/news/2015/01/news-feed-fyi-showing-f...
And, if left to users, considering we have the type of users who believe in a #BoycottStarwars movement, would you really want to leave this feature in the hands of said users?