This was the straw that broke the camel's back and convinced me surveillance industries had to be stopped:
https://www.engadget.com/2018/03/30/leaked-facebook-memo-ugly-truth/
"Maybe it costs a life by exposing someone to bullies. Maybe someone dies in a terrorist attack coordinated on our tools."
"... all the work we do in growth is justified. All the questionable contact importing practices. All the subtle language that helps people stay searchable by friends. The work we will likely have to do in China some day. All of it."