TechCrunch broke news in April that Zuckerberg had retracted some Fb messages from recipients' inboxes in what was seen as a violation of trust & abuse of power since Facebook didn't have an Unsend button...yet 1/ 
Facebook PR sprang into action the next morning, saying it would build an Unsend messages feature for everyone, framing Zuckerberg as just its first beta user. But then six months went by with no progress until...2/
Last week TechCrunch asked Facebook where the Unsend button was, and it told us "Though we have nothing to announce today, we have previously confirmed that we intend to ship a feature like this and are still planning to do so." But then... 3/
Facebook is now prototyping the Unsend button that deletes messages from both your inbox and the recipient's. Screenshot dug out of Messenger's code by @wongmjane 4/
The Unsend button could make users more comfortable talking freely on Messenger, but also enable harassment as bullies can delete the evidence. Here's my story on the feature techcrunch.com/2018/10/12/fac… 5/
