The "random" board, /b/, follows in the design of Futaba Channel's Nijiura board. It is by far 4chan's most popular board.[14] According to Gawker.com, /b/ is summarised as a board where "people try to shock, entertain, and coax free porn from each other". Encyclopedia Dramatica's definition of the board as "the asshole of the Internet" is also cited.[10] Certain post numbers, such as 12345678 and 22222222, and every millionth post, are sought after, with a large amount of posting taking place to "GET" them.[15]
/b/ is known to officially have a "no rules" policy, save for a ban on certain illegal content, such as child pornography, invasions of other websites, and under-18 viewing, all of which are inherited from site-wide rules. This "no rules" policy applies to administrator and moderator actions as well, meaning that users may be banned at any time, for any reason, including no reason at all.[16]
The humor of /b/'s many users, who refer to themselves as "/b/tards",[17] is often incomprehensible to newcomers and outsiders, and is frequently characterized by intricate inside jokes and black comedy.[17] Gawker.com's Nick Douglas said of the board, "reading /b/ will melt your brain".[10]