Re Facebook's social graph -- they chose to do something visionary. No one else was up to the challenge of such a huge database, and they pulled it off, at a huge ever-increasing scale. #
In hindsight maybe it seems like a bad idea, but you'd have to know in advance that users would have no idea what was going on, and wouldn't care about privacy (until journalists told them they should). An open protocol was never going to get adopted, most individual devs like to reinvent, not build on others' work. #
You won't often hear me defend Facebook, but please, some of the critics are seriously misinformed about how the tech works, and how we got here. Yes, it matters. #