We should be careful about taking the filter bubble
(http://en.wikipedia.org/wiki/Filter_bubble) idea too far, where the app
mysteriously chooses what you see, for reasons unbeknownst to you.

If we look into following users, we need to be sure that will actually
promote productivity, rather than simply endless clicking around
(without actually *doing* anything) Facebook-style or wiki-hounding
(https://en.wikipedia.org/wiki/Wikipedia:Harassment#Wikihounding)