So far we know below about >>13;
・Buried threads which delete was rejected
delete request was in http://gimpo.2ch.net/test/read.cgi/drunk/1262207892/
actual thread is http://gimpo.2ch.net/test/read.cgi/drunk/1262207892/
・Most of posts are from Niigata prefecture, sometimes include Tokyo and Kanagawa
・Post originate from more than 15 ISPs. Speculated to have massive amount of accounts.
・Copies sentences from external sites.
・Sentences used are matched to thread's subjects so their posts are not obvious at a glance.
・Never uses dedicated 2ch browser, or P2. No confirmed post from cellphone.