Blocked everyone using singnet.com.sg as his ISP. A lot accounts are affected by this, but I think about 90% of those are already banned, or reset.
FYI, here's the list of all users on those IPs, and their state (banned or not):
Unique users: asdasd, John Samson, Puiz, Sleeper, blahz, Flameblyzerd, Ishimaru, ZsecretZ, Carnagez, fdghjfjk, Simon, Armifer, huiching, Rock, SlipKnoX, xapo, MistiK, TuffBunny101, Vexio, Korshak, Manson, dotslack, Joansky, SkyJoan, li4w, Corlist, AssasinX, sianzdiao, CBloco, Elydis, sianzdiao2, Suteki, Gbl, Storm, magb, kong, Gadien, G Beee, magnadel, Zian5154, Void, Numb, Silveron, scream, Adin, Peggy, ljw, mist, Animosity, Wrath0fGod, lalalalal, Alien, St Michael, Stop killing me, xiangge, Born Free, Slash, MegaManV, GemXiang, iw, cursed one, aaaaaaaa, Rukhan, SlipKorN, inuyasha, JiaHui, Ian Han [forger], Mag, FlamerWiz, Kira Yamato, wahz, Zee Bug, Dark magic, SlipKorNz, diediemusttry, fusion, Steel, Elof, New World Order, Bon Jon, lalala, Legend, Demise, Xcarnage, Waha, Athrun Zala, Roven, zxvxz, Bo Bo, Magna, Xsudeki, tigerkiller, Furven, onlyyouknow, Eric Cantona, Zian913