The San Francisco Chronical’s site SFGate.com charts some fo the woes of social networking sites Facebook and Digg.
Facebook: user backlash after the site introduces “news feeds” which some liken to stalking
Digg: users rebel against top users whom they accuse of gaming the front page

A lot has been made of the virtues of involving users in creating and managing content. These two example illustrate the other side of the coin – user power is a two-edged sword.

Update: Robert Scoble offers his own words of advice on how to manage the Facebook situation