The statement could be pushed over to just about any true Web 2.0 site where voting and popularity determine the success of a piece of content. Facebook, Twitter, and MySpace – overrun by spam. Mixx, Propeller, Yahoobuzz – spam havens.
For social news powerhouses Digg, Reddit, and StumbleUpon to be so changed by the presence of gobs and gobs of spam hits a little harder. They are the sites where I started my journey in Web 2.0. They are the shiny beacons of user-controlled, traffic-generating goodness that made mainstream media look to the people for their opinions and discoveries.