Surely source-loving Wikipedians can find many sources that Wikipedia has come under attack for harboring pedophiles in its midst.  If you think you can't, you're not even trying.  You can start by searching here: 

 * http://www.google.com/search?q=pedophilia+on+Wikipedia 
 * http://www.google.com/search?q=wikipedophile 

 And of course, let's not forget: 

 * http://www.wikipedia.org/ 

 In articles about Wikipedia, direct links to history pages on Wikipedia are fine. 

 The Criticism of Wikipedia page is one of Wikipedia's saving graces.  It has always implied that you have some humility and realism about the limitations and problems of the project.  But if you leave out your well-known wikipedophile problem, you're engaging in a whitewash.