The article Virgin Killer was blocked for four days because of "child pornography".

https://en.wikipedia.org/wiki/Virgin_Killer

https://en.wikipedia.org/wiki/Wikipedia#Sexual_content

I'm guessing it's this case he's referring to: http://www.theregister.co.uk/2008/12/07/brit_isps_censor_wik...

I guess wikileaks, not wikipedia