For the record, the picture is mine, downtown Atlanta, 2004 (I needed my own photo from Georgia for this posting). It's Braves Country.
Update: March 27, 2013
Timothy B. Lee has a more detailed story on Ars Technica, discussing the nature of Chan's own posts and those of some of the forum contributors. Chan could be held responsible for damaging aspects of his own posts but not for others whom he allows to post on his blog. Apparently posts from both Chan and at least some forum contributors contained language that could be construed as of a threatening nature. The link to the new story is here. The title is telling: "'I made some stupid posts'. Anti-troll site gadded after threats against poet".
This article appears in the "Law & Disorder" and "Civilzation & Discontent" column at Ars.