In theory, Wikipedia articles are supposed to be written by disinterested volunteers based on reliable secondary sources. However, because Google will rank a Wikipedia article as the first result when a person searches on the article's title, public relations firms and "reputation management" companies work hard to remove any negative or controversial facts from Wikipedia articles relating to their clients. Although such paid editing is not allowed, Wikipedia does little to enforce its rules against paid editing and there are numerous examples of paid editors introducing biased content on behalf of their clients. Wikipedia selectively fails to enforce its ban on paid editing when the payments come from its large donors.<ref>{{cite news|url=http://wikipediocracy.com/2014/03/18/the-thin-bright-line-part-2-wikipedia-donors-feel-entitled-to-more-than-a-mug-or-a-tote-bag/|title=Wikipedia donors feel entitled to more than a mug or a tote bag|date=March 18, 2014|accessdate=April 3, 2014|first=Greg|last=Kohs}}</ref> Many organizations that visit the WMF Headquarters also engage in undisclosed paid editing to promote themselves.<ref>{{cite news|url=http://wikipediocracy.com/2014/07/06/look-whos-visiting-the-wmf/|title=Look Who Is Visiting the WMF|date=July 6, 2014|accessdate=July 17, 2014|first=Greg|last=Kohs}}</ref> | In theory, Wikipedia articles are supposed to be written by disinterested volunteers based on reliable secondary sources. However, because Google will rank a Wikipedia article as the first result when a person searches on the article's title, public relations firms and "reputation management" companies work hard to remove any negative or controversial facts from Wikipedia articles relating to their clients. Although such paid editing is not allowed, Wikipedia does little to enforce its rules against paid editing and there are numerous examples of paid editors introducing biased content on behalf of their clients. Wikipedia selectively fails to enforce its ban on paid editing when the payments come from its large donors.<ref>{{cite news|url=http://wikipediocracy.com/2014/03/18/the-thin-bright-line-part-2-wikipedia-donors-feel-entitled-to-more-than-a-mug-or-a-tote-bag/|title=Wikipedia donors feel entitled to more than a mug or a tote bag|date=March 18, 2014|accessdate=April 3, 2014|first=Greg|last=Kohs}}</ref> Many organizations that visit the WMF Headquarters also engage in undisclosed paid editing to promote themselves.<ref>{{cite news|url=http://wikipediocracy.com/2014/07/06/look-whos-visiting-the-wmf/|title=Look Who Is Visiting the WMF|date=July 6, 2014|accessdate=July 17, 2014|first=Greg|last=Kohs}}</ref> |