Networks do great harm by appearing enough like real communities to create expectations that they can manage human social and psychological needs. The reality is that they cannot. Even associations as inherently harmless as bridge clubs, chess clubs, amateur acting groups, or groups of social activists will, if they maintain a pretense of whole friendship, ultimately produce that odd sensation familiar to all city dwellers of being lonely in the middle of a crowd. Which of us who frequently networks has not felt this sensation? Belonging to many networks does not add up to having a community, no matter how many you belong to or how often your telephone rings.