For years, Wikiquote has been smearing Rush Limbaugh by falsely pretending that he said the following (en.wikiquote.org/w/index.php?title=Rush_Limbaugh):
You know who deserves a posthumous Medal of Honor? James Earl Ray [the confessed assassin of Martin Luther King]. We miss you, James. Godspeed.
With a quote that inflammatory, one would think that Wikiquote would be sure to find an absolutely reliable source. But, their only source is a book from the Nation that was published 10 months after the unattributed quote was added to the same Wikiquote page.
Yes, that's right: the quote was added to Wikiquote without an attribution. Then, 10 months later, it appeared in the book "101 People Who Are Really Screwing America" by Jack Huberman. Now, that same book is being used as Wikiquote's source for the quote. 
No one else has been able to provide even a hint that Rush Limbaugh ever said anything like the above, and all attempt to pin it on him lead back to Wikiquote. No other "watchdog" group - such as Media Matters - claims that Limbaugh made the quote. The fact that it's currently in Wikiquote's "disputed" section is not an excuse; unless they can find a reliable source for the quote that doesn't involve circular sourcing, they should remove it.
Repeated attempts to reach the Nation received no reply; the reader is invited to contact them: nationbooks.org/p/contact_us
 The quote first appeared in the 06:01, 20 July 2005 revision, with a supposed quote date of 2/21/03. Just three minutes later, the person using the same IP address changed the date to 4/23/98. The book page containing the quote is here. He preferences the quote discussed here and others with: "the watchdog group Media Matters for America, which monitored the Rush Limbaugh Show for around six weeks in the spring of 2004... Many of the following Limbaughisms come from just the short period that Media Matters monitored". However, the James Earl Ray quote is only one MMFA's site in a comment from one of their users; it doesn't appear in any of MMFA's reports.