Industry Responses to Computational Propaganda and Social Media Manipulation (Oxford Information Labs) — a summary of the responses to the 2016 election tampering. tl;dr: no policy change, a flurry of initiatives, substantial differences between platforms in how they tackle it—which probably reflect the differences in their $ strategies.
A Practical Way to Include an Ethics Review in Your Development Processes — nine questions: Is this work (project) illegal in any country? Does this work respect the dignity of all people? Is this work something that is sustainable? Does this work foster transparency, and honesty? Does this work require people to think about potential harm or good? Can I do this and tell my family about it proudly? Can we describe the balance between good use and harm? Does this protect and respect the moral rights of our customers, users, vendors, or employees? Are we treating everyone fairly?