This was discussed and patented already in June 2016. Here is an article, including a link to the patent: http://techpp.com/2016/06/24/facebook-messenger-unsend

This was discussed and patented already in June 2016. Here is an article, including a link to the patent: http://techpp.com/2016/06/24/facebook-messenger-unsend-message/ http://techpp.com/2016/06/24/facebook-messenger-unsend-messa... . Hardly something they have started to put together after the scandal, but maybe the worst timing or idea to go back to now...