How do i block people from messaging me that aren't on my friends list on FACEBOOK?!?

[Jake Sanchez]

Unfortunately Facebook has decided to do it this way and we no longer have the option of complete privacy from the public...all we can now do is try to make our privacy settings as "private" as is possible...Strict filtering of messages is the closest we can now come to making our messages private, this will cause non-friends to either have to spend $1.00 to send us a message in our regular"inbox" or else send it to our "other" messages...It is not right and should not be, but what choice does Facebook ever give us (other than to just find another social medium, which most of us wont do)...you can give feedback to Facebook by going to the end of the blue bar at the top of your Timeline, click on the "gear" icon , click "help", click "report a problem" click "give feedback" and let Facebook know how dissatisfied we are with this "new" messaging arrangement.

Log in to your personal Facebook account and click "Messages."
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Click "Other" at the top of the left pane.
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Click "Edit Preferences."
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Click "Strict Filtering" and then "Save." This option allows only friends to message you, but you may occasionally receive messages from people that include you in a message to a mutual friend, group members or someone using the Facebook Messenger app.