Facebook's C&D letter [0] reminded me of how difficult it was to migrate my friends to Google Plus because the Facebook TOS prevented third party access to contact information and mass messaging. With the recent whistleblower testimony [1] I was thinking one of the most impactful decisions Congress could make would be enabling users to fully own their contact lists. Organic growth of alternative social media platforms would be easier if all it took was a click of a mouse to send all your contacts a message on your other platforms.
[0] https://news.ycombinator.com/item?id=28801908
[1] https://news.ycombinator.com/item?id=28741532