Note that there have been two recent Buzzfeed articles about Commons and Wikipedia, by Jack Stuef, who is a writer for The Onion:
1. The Epic Battle For Wikipedia's Autofellatio Page
In the underbelly of Wikipedia is an exhibitionist subculture dedicated to one thing: Ensuring that their penis is the visual definition of penis. Meet Jiffman, one such exhibitionist. (This article is very probably NSFW.)
A shorter version of this article is also available in French:
2. Wikipedia's Kiddie Porn Problem
A shorter summary of this story is also on Gizmodo:
Why Is It So Hard to Get Kiddie Porn Off of Wikipedia?
For those interested, there are related discussions on Wikipediocracy.com:
Andreas
(I'm a moderator on Wikipediocracy, posting with the handle HRIP7.)