Some variation of this topic comes up over and over again.

I've seen people bitch about Brazilians on Orkut, Chinese on WoW, Blacks on MySpace/Twitter, Indians on Quora and Android users on Instagram.

For all its potential as a connector, the Internet is full of homogeneous echo chambers. There's some threshold for these places where integration suddenly becomes a "problem".

I've occasionally wondered if the future of recommendation engines are systems which feed us a steady stream of what we want to hear and filter out everything and everyone else.