We all learned a painful lesson from Facebook. Now Facebook is learning it, too.

There’s a lesson in that, even if you aren’t planning to launch a media site, or a social media platform. Our ferocious arguments about who should be kicked off Spotify, or Twitter, are fundamentally about the same problem: So much of our public life takes place on a handful of technology platforms, where what we see and whom we reach is determined by policies set by some faceless programmer in Silicon Valley. We are all of us tenants of the digital manor — even, it turns out, some of the lords.