https://www.salon.com/2014/01/03/facebook_is_reading_your_private_messages_new_lawsuit_alleges_partner/
Facebook is reading your private messages, new lawsuit alleges - Salon.com
Jan 3, 2014 - "Contrary to its representations, 'private' Facebook messages are systematically intercepted by the company"
your private messagesfacebookreading
https://www.techradar.com/news/internet/has-facebook-been-snooping-on-your-private-messages-1211828
Has Facebook been snooping on your private messages? | TechRadar
Jan 3, 2014 - Facebook says claims are 'without merit'
your private messagesfacebooksnoopingtechradar