It's a lost cause. If a WoW private server intends to be successful, they have to block all VPN & Proxy use. Mainland China players rely on those to evade the Great Firewall. The staff at Valkyrie won't do this so the new Nostalirus currently looks like this in the battlegrounds.
http://imgur.com/XU7aMLC
Both NA and Russian players are in the minority for the population, which gives us a hilarious server economy future.