Some examples of altered wikipedia entries altered from computers with IP addresses linked to wikipedia entries critical of them include the wikipedia page on Wal-Mart from the original posting on wikipedia, which states: Wages at Wal-Mart are about 20% less than at other retail stores. Founder Sam Walton once argued that his company should be exempt from the minimum wage. A computer with a Wal-Mart IP address was found to have changed it to, The average wage at Wal-Mart is almost double the federal minimum wage (Wal-Mart)
Other examples given had a more conspiratorial flavor, the CIA and FBI of course as well as the site for Dow Chemical.
I personally don't worry about this too much because I treat everything I read on Wikipedia and the rest of the internet just like I treat any statistics I come across. If it doesn't mesh with my pre-conceived ideas, out it goes. It's obviously biased.
What's your opinion? Are there internet sites you trust to deliver unspun truth? Or is it all suspect?