I have browsed 8ch extensively in the past, and continue to browse 4chan. You'll be exposed to disgusting imagery from time to time, no doubt, but the idea that 8ch is censored because of illegal and disgusting imagery is so incredibly disingenuous, this is clearly about political censorship of right wing extremism.
If I had a bit less faith in humanity I would even go as far as to suggest that the Wikipedia thread is crafted to be about CP and not politics for the sake of justifying censorship and rewriting history. 8ch was not controversial because of CP, it was controversial because of extremist politics, and attempting to rewrite history like this is just so typical of Wikipedians these days.