This news story details the right vs left political grassroots battles on the net which have taken place on sites like FR and DU, and what tactics are used ("enemies lists" and lawsuits).
Some excerpts:
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Grass-roots political Internet sites have been springing up since the 2001 terrorist attacks. Those on the right vilify anyone who does not support President Bush and the Iraq war as communists and un-American, while those on the left use common curses to describe people on the right as fascists.
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Altogether, the Internet chatter is part of the partisan echo chamber of talk radio and political cable television shows that some experts believe has intensified the polarization of America's electorate. Polls indicate American voters are at their most divided in a decade, with a partisan split on national security at its highest level since the late 1980s. A Pew Research Center poll conducted earlier this year also found the number of people who get presidential campaign news from the Internet grew from 9 percent in 2000 to 13 percent this year. The number of people getting campaign news from traditional sources such as television networks and newspapers has declined as much as 10 percent.
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"The people who tend to go to these sites are people whose views are pretty well entrenched," Gimpel said. "It's likely to enhance polarization. It's likely to enhance extremism. But it's not likely to create many converts."
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Postings on the FreeRepublic site often urge readers to call the employers of liberals to report their anti-war sentiments. Doug said he was motivated to post the enemies list because his son-in-law is in the Navy and one of the signers of the anti-war petition identified himself as being in the U.S. Coast Guard.
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Du is mentioned in the sidebar on the right:
"Liberal: Democraticunderground.com -- Those who use the site are called DUers."
More here:
http://www.chron.com/cs/CDA/ssistory.mpl/front/2650296