Image (ironically) provided by Wikimedia!
"Can a noncommercial website use the trademark of the entity it critiques in its domain name? Surprisingly, it appears that the usually open-minded folks at Wikipedia think not. The EFF reports that Scott Kildall and Nathaniel Stern have created a noncommercial website at Wikipediaart.org intended to comment on the nature of art and Wikipedia. Since 'Wikipedia' is a trademark owned by the Wikimedia Foundation, the Foundation has demanded that the artists give up the domain name peaceably or it will attempt to take it by legal force. 'Wikipedia should know better. There is no trademark or cybersquatting issue here,' writes the EFF's Corynne McSherry. 'Moreover, even if US trademark laws somehow reached this noncommercial activity, the artists' use of the mark is an obvious fair use.' It is hard to see what Wikipedia gains by litigating this matter, but easy to see how they lose."
See the EFF article here:
The legal history here: