Here is an interesting article by David Swindle of Front Page, about Wikipedia's problems with biographies of living persons. Swindle sees it in terms of a persistent left wing bias.
I won't pretend to agree with everything he says--it is not helpful to compare Michael Moore to Ann Coulter or Keith Olbermann to Glenn Beck. The gist of the article has merit, though. I think he makes some reasonable points about the biographies of Noam Chomsky and that deceased poster child for youth rebellion, Che Guevara.
http://frontpagemag.com/2011/08/23/how-the-left-conquered-wikipedia-part-1/