Using MediaWiki does not make you an encyclopedia
A number of commentators not familiar with the details of and distinctions between MediaWiki, Wikimedia and Wikipedia have concluded from the use of MediaWiki software by a wide variety of websites that they are somehow "imitating Wikipedia", "cloning Wikipedia" or are attempting to build an encyclopedia to compete with Wikipedia. They have suggested that people doing this are being somewhat hubristic or self-aggrandising in believing that their point of view "deserves" its own encyclopedia.
This conclusion may be correct, but it is not correct for the reasons they believe. Using MediaWiki doesn't mean you are trying to be Wikipedia, nor does it mean you are endorsed by the Wikipedia community, or by the Wikimedia Foundation. MediaWiki, the software used for Wikimedia projects including Wikipedia, is free software and can be used by anyone. The visual themes that come installed by default with MediaWiki have been used on Wikipedia by default (specifically Monobook and Vector). Using those themes does not mean you are 'imitating' Wikipedia. It is a commonly available set of layouts that can be used freely. Many blogging services like Tumblr, Wordpress and Blogspot provide default templates too.
MediaWiki comes set up to use Vector—the default theme of Wikimedia projects including Wikipedia—by default. Creating a site that "looks like Wikipedia" is very easy. Creating it to not look like Wikipedia is much harder. Please try to avoid concluding that a site is Wikipedia or is attempting to ape Wikipedia because it uses the same software as Wikipedia.
See also 
- WikiLeaks is not part of Wikipedia on English Wikipedia
- “Rationalist” encyclopedia stumbles onto non-materialist neuroscience, Uncommon Descent weblog
- A comment on Huffington Post
- GOP group crowdsources Obama administration info, CBS News website