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It's been uncovered that Fox News has been making changes to the Wikipedia entries of their competitors and critics.
Edits made to author Al Franken's Wikipedia entry was tracked back to a Fox News IP address. One of the changes to Franken's Wikipedia entry about the lawsuit against him, brought on by Fox, clearly reflects Fox News' desire to avoid any bad press or misgivings about itself as a brand.
It's known that companies are rather concerned with the protection of their brands, and have edited Wikipedia entries to uphold their brand names in a positive light. We just covered a service built by a CalTech student yesterday, called Wikiscanner, that will sniff out the people and companies behind Wikipedia entries, and it was found that it's very common to see edits about a particular company come from the company's own IP address. It was Wikiscanner, in fact, that caught Fox in the act.
While policy changes have been made to Wikipedia, and a new edit-tracking system is being tested on Wikia for future use on Wikipedia, the user-submitted encyclopedia may need to find more ways to enable to enable the regulation of its entries.