"Discover the Network"

Michael Berube has been having a bit of a duel with David Horowitz over Horowitz's goofy (but evil) "Discover the Network" website.

This site seriously presents the below diagram (see the full diagram here) as constituting a "network" of "leftists" that needs to be investigated and scourged by the patriotic efforts of conservative American websurfers.

I think Berube's instinctual response to stuff like this this -- to smirk -- is the correct one. If this is the best David Horowitz can do...