[omail]

A slight inaccuracy, 4chan is moderated, even the "unmoderated" parts. Linky: http://www.4chan.org/rules

[DrJokepu]

As far as I know, the 4chan /b/ (random) board is only moderated to the extend they're minimally required by law such us banning underage users (as it's an adult board) and removing child porn.

[thirdusername]

You are almost correct but it's not entirely without rules, 4chans /b/ people keep saying "bring back snacks" where snacks are referring to the ban on:

* "Post ending in x"

* Gay porn

* People seeking attention but not "putting out"

Refence but keep in mind the common sense thing is to not click encyclopedia dramatica links if are at work or want to avoid knowing useless things: http://encyclopediadramatica.com/Bring_Back_Snacks

For the record I don't actually visit 4chan, I just happen to know this out of sheer morbid fascination.