simon balmain: We used to say at Twitter 1.0 that we were "a community of communities". And I think we all understood that, if that breaks down, if any one group or interest began to dominate the timeline...... People would head for the exit. You're seeing that play out in real time.

We used to say at Twitter 1.0 that we were "a community of communities". And I think we all understood that, if that breaks down, if any one group or interest began to dominate the timeline...... People would head for the exit. You're seeing that play out in real time.