Edwards Lin from 2P writes: as all we know, in World of Warcraft, players from different factions cannot exist in the same guild. But today, this system was proved that it can be breakable. According to the well-known WoW forum NGA, someone reported an Alliance guild in Chinese server had the Horde characters.
via N4G: pc news feed http://n4g.com/news/1402474/world-of-warcraft-breaking-bug-the-horde-character-can-join-alliance-guild
via N4G: pc news feed http://n4g.com/news/1402474/world-of-warcraft-breaking-bug-the-horde-character-can-join-alliance-guild