Perhaps, given the new legislation coming out of China this week. Of course while all gold farmers certainly aren't based in China, a substantial percentage of gold farming operations are in fact run from the country. Such operations may now find themselves under greater scrutiny by the Chinese authorities; the government has now established its first official rule on the use of virtual currency in China.
Essentially, it states that virtual currency cannot leave the sphere of influence of its issuer. (Exact wording: "The virtual currency, which is converted into real money at a certain exchange rate, will only be allowed to trade in virtual goods and services provided by its issuer, not real goods and services.") If the law is actually obeyed and enforced, it would curb all manner of black market activities in China connected with the virtual.