United States
A United States Congressional committee investigated taxation of virtual assets and incomes derived from them in 2006,[27] and the IRS has, in its National Taxpayer Advocate's 2008 Annual Report to Congress, expressed concern that virtual worlds are a growing source of tax noncompliance.[28]
Lawsuits by game companies
Zynga, the makers of FarmVille, successfully sued to stop online sales of its in-game currency.[29]
Jagex, the makers of RuneScape, have engaged in actions against several gold farmers and bot programmers including lawsuits.[30]