Balkanization of viewpoints -- the Web as self-enforcing echo chamber
"In 1996, political speech on the Web exhibited a rich diversity of perspectives and formats. Political speakers, however, tended to discourage public debate by refusing to provide links to opposing viewpoints....The data presents a bleak vision of democratic discourse on the Web. [O]nly a small minority of partisan sites ... offered links to opposing viewpoints"
A. Chin, Making the World Wide Web Safe for Democracy, 19 Hastings Communications & Entertainment Law Journal 309 (1997).