I like how we Hacker News users are brave enough to admit under very public profiles that we have, in fact, been to 4chan. EDIT: This post was not sarcastic or ironic. Though I do think /pol/ is a hive of neo-Nazi scum /flameproof-suit.
When you censor the rest of the internet, the "scum" (aka people with non-PC opinions) will concentrate where they can talk without fear of censorship. You can be a "political-normal" on /pol/ but you won't have the politically-correct wind at your back like you do in so many other places.
Massive props to Moot for keeping 4chan alive as a bastion of free speech.