Forget them. They will at most scam the US authorities or goverment. Reality is that Bitcoin will spread over the world and China is currently the most surging market. How will they force any Chinese individual to give them their ID ?? What they can achieve at most is advanced regulation for the US customers which cooperate - I am wondering sometimes how much US people let their goverment do to themselves. But even against US citizens who are not willed to cooperate these guys would not be able to do anything - that would be similar to Torrent.
What's the point of creating a coin taint database, which cannot possibly make any significant revenue from anywhere except government funding, and then not using it to enforce some new cryptocurrency taint law?
Then, all businesses have to comply, as the cost of accepting potentially tainted cryptocurrency will be too much to bear. It's receiving money where you're restricted in where you spend it, the network affect of doing this will very gradually tighten around everyone using Bitcoin. People all over the world will have easy access to check the status of the coins they have received or will receive, and will reject people who wish to send from "unregistered" addresses, afraid they will (eventually) be unable to spend them.
Big assault on Bitcoin, make no mistake.