Ostrich Syndrome is when people prefer to 'stick their heads in the sand', much as an ostrich does, rather than accept some uncomfortable facts. On wikis, especially liberal ones like Wikipedia, this is achieved by deleting all mention of these facts from articles or talk pages.
Despite the wide-spread popularity of the saying, ostriches do not actually bury their heads in the sand. Historians believe the saying may have risen from the writings of Pliny the Elder who wrote "...they imagine, when they have thrust their head and neck into a bush, that the whole of their body is concealed".
- http://www.abc.net.au/science/articles/2006/11/02/1777947.htm Dr Karl's Great Moments In Science - Ostrich head in sand