I think that one of the bigger obstacles we have is the perception of it all, with FF being "only a game". in most places of the world, in Europe especially, if you want to operate in a specific market, you have to submit to local law, even in video games, and no ToS can replace the law. Instead, the law may make a specific ToS unlawful. Is that the case? Can't answer that, I'm not a lawyer, no clue if that concept has any legal merit in this case.
Obviously this doesn't help much if even the authorities regard these complaints as a joke and refuse to activate any legal mechanisms. They wouldn't if these accounts had recognized/official monetary value (I'm not talking about underground value like selling it on Ebay). However, do we want the authorities tracking the virtual currency that we MAY be able to sell? I can't answer the question, it could end up being like opening Pandora's box.
Ssubpoenas shouldn't be the answer, sueing even less. Besides, speaking for myself, that's the NA way. As an euro, I kinda frown at the concept, the Stella awards are example enough of how ridiculous it can become. A simple report should be able to be enough, like when you lose/get your wallet stolen, in order to present that to banking agencies, documentation centers, etc.