China: Ongoing online ‘jihad’ against Korean pop fans · Global Voices
John Kennedy

An online ‘jihad’ reached its peak Wednesday night with massive numbers of World of Warcraft players (“wowers”) swarming popular forums for fans of Korean pop boy bands on Baidu, trying to drown them in virtual noise. A Tianya post on the spam battle between the wowers and the K-pop fans has received over 100,000 views in the four hours since it was created.
Update2: Yet more on the ‘jihad’ from EastSouthWestNorth‘s Roland Soong which shows that China's ‘Red Hackers’ (Hongke) became involved in attacks that went beyond Baidu to include the targeting of Korean websites and more.
It all started on the morning of May 30, the day of a Super Junior (“JS?“) concert at the 2010 Expo in Shanghai; free tickets ran out sooner than anticipated and fans turned violent, leading to a stampede. Roland Soong at EastSouthWestNorth blogged the incident at the time with a translation from the Apple Daily newspaper:
According to information, the Korean Pavilion was supposed to distribute free tickets in the morning, midday and early evening.  Almost 500 female fans were already waiting in the Shangnan Road entrance, many of them traveling from outside Shanghai.  At 9:30am, the World Park opened and they sped through the process as quickly as they can.  “Everybody sprinted towards the South Gate!”  Although a large number of armed policemen were ready in the form of a  human chain, the fans surged forward like a tidal wave, screaming and shrieking along the way.  The armed police line could not hold them back, and reinforcements had to be called in repeatedly.  Spectators exclaimed, “Heavens!  This is horrifying!”
[…]
According to information, as the passion soared, the crowd surged forward.  A second-floor railing broke and a young woman fell down and died.  The crowd panicked and a stampede resulted.  According to information, more than 100 persons were injured.  According to Internet users who witnessed the scene, “the scene was chaotic, people were crying loudly and shoes were scattered all over the ground.”  The ambulance sirens were heard continuously in Area A.
The ‘jihad’, as wowers are calling it, seems to have been sparked by embarrassment arising from the Super Junior show incident and has a strongly xenophobic message, but is also part of an ongoing feud between the two tribes. Indie blogger and [update: apparent] ‘jihad’ supporter Xiao Bai tells it this way:
韩国馆方30日在世博会文化中心派发5000张免费门票，凭世博会门票免费兑换，这是引发追星族疯狂的原因。日媒视频可见民众疯狂。
然而实际派发的门票只有2000张，大批疯狂女粉丝为抢票，疯狂向前冲挤。志愿者被挤散，在场的武警围成人墙，以防因人群过度拥挤发生踩踏。抢不到票的粉丝不但高呼口号，向在场武警发泄，甚至冲入世博官员办公室大吵大闹，坚称免费门票被官员拿走，誓要世博局作出交代，情况混乱。
现场回放：
为抢票棒粉辱骂殴打组成人墙的武警，向他们吐口水；一女粉甩手打了武警一耳光，被他反手压制在地，奋声高呼武警打人，一群棒粉蜂拥而上拳打脚踢；因为不能通过武警铸成的人墙，一个女生把上衣一脱，大声高喊：武警强奸我！棒粉被挤倒，武警伸手去扶，立马被人潮践踏在地，还拼命将她护住。
——说歪曲事实，你敢说没对武警动手骂人吐口水？去现场的不都是棒粉好不好？
棒粉虽然脑残，但韩国馆难辞其咎。明明只派发2000张门票，却对外宣布5000张。他们初衷是什么不得而知，但之前某问题缠身的韩国演艺公司为凸显人气，演唱会放出的门票比外宣的少很多，为抢票粉丝们陷入混乱状态，以此造成人气爆棚的印象。
但是他们没想到事情会这样严重，事故发生后，韩国馆做无辜状，将所有责任推给世博会和FANS。
馆内SJ某成员痛哭流涕道，愿自己给粉丝掏钱买票（不是说票是免费的吗？），让武警放进一批来。这如此加激化了原本混乱的状态，其他地方的棒粉疯狂向这边涌来。
并不是所谓”孩子“，NC也许并没有年龄限制。
图中的武警DD，看肩章也就是刚入伍的小孩儿啊，不过17、8岁。
很多武警受伤严重，这次执勤的武警很多是刚刚从东突战场上下来的，真刀真枪练过，要是真放开手脚，你想一想……亏得是子弟兵，打不还手，骂不还口。
组成人墙严阵以待的武警战士
我不明白都挤成这样了，政府还在粉饰太平，现场已经形成了踩踏事故。究竟有没有死人，到现在依然没有定论，但是普遍流传出来的消息：多名武警受伤，11名武警重伤
丢人啊……这一幕已经被多个国家记录并传发到世界各处，当时各国的摄像镜头就闪个不停啊。
日媒对此表示担忧，韩媒称中国粉丝素质太低下。
这些武警都是十七八岁的大男孩，甚至比这些棒粉都小很多，身板虽然挺直，但并一定虎背熊腰，怎么抵得住这样的凶猛。
同样是十几岁，看看你们在做什么，人家在做什么？——那个我错了，这些棒粉们其实年纪都挺大了，巨婴啊
丢人啊……这一幕已经被多个国家记录并传发到世界各处，当时各国的摄像镜头就闪个不停啊
棒子粉丝都给我滚进来，你们丢中国人的脸你们就都不是中国人，都给我滚出中国！！你们凭什么在武警脸上吐口水！！！那些韩星是你爹妈吗？？？生你养你了吗？？我鄙视你们，瞧不起你们，滚出中国！！！！
一下是各网友对6.9的态度！！
…………圣战继续！！！
‘The June 9 Jihad’
From Sina.com blogger yuanzhang1987's May 31 post we get an idea of how this jihad began:
现在wow吧圣战仍在继续，7点的时候，爆了SJ吧。据说爆吧速度是一分钟40页，可惜我没看见。杯具，我本来以为爆吧是8点开始的。谁知道wower7点就开始行动了。当然，我不是爆吧的主力，我只是围观的。
至于为什么要爆SJ吧，这就要从昨天晚上的世博会开始说起了。
[…]
这就是昨天晚上发生的大概情况，早上有人在wow吧发了帖子，然后激起了wower的愤怒。于是，就像当年对仙后一样，wower觉得需要我们的时候到了，于是，圣战自然就来了。
7点钟，wower开始爆SJ吧，好像很快就搞定，SJ吧开了无敌。然后8点钟，wower开始各个击破，去爆sj成员吧，金希澈、金基范、李东海等吧纷纷被爆，都开起了无敌。
事情就是这样，很简单，wow吧又一次的圣战以胜利而告终。不过，却没有当年爆仙后吧的那种快感，现在很多韩流的fans应该都喜欢已经被爆了吧，看他们从容地申请会员发帖就知道了。
As for the Cassiopeia attack, according to this Q&A post on Baidu, the WoW player ‘jihad’ against Korean boy bands and their fans began following an incident with a pregnant stalker of TVXQ in 2008. A similar post at another site suggests that after wowers showed up in person to protest outside a TVXQ concert at the Beijing Workers Stadium last summer, Cassiopeia members mobilized their own blast attack against the World of Warcraft forum on Baidu.
Update1: More on this from Roland Soong at EastSouthWestNorth: The 69 Crusade/Jihad