AT&T Blocking Part of 4chan
Popular /b/ board blocked
According to a status update by 4chan maintainer moot, AT&T is blocking its customers from accessing parts of the 4chan message boards, including /b/ ("random"), which is responsible for 30% of 4chan's traffic.
4chan's /b/ section is infamous for its "no rules" policy, with the only rules being a ban on certain illegal content, such as child-pornography (although virtual child-pornography is tolerated), and "invasions" (organized incursions into and flooding of other online communities).
AT&T has made no statement explaining or even confirming the action.
Originally an English spin off of the Japanese 2chan BBS, 4chan has become immensely popular in its own right.
Source: AnimeNewsNetwork