If you take 100 unique people from China for example who signup, maybe 5-10 over the course of a month will be terminated for whatever. Unfortunately those 5-10 sometimes create 100 accounts each thinking that a few accounts will slip through the cracks.
Now this isn't just in China, Turkey, Romania, India, and Iran are the same way. Sure I could just block those countries completely, but they would just use proxies servers in Canada or England. Those are the guys who think they are slick, but they are usually easier to detect than the people who put in their correct country and use a local isp.
I personally have no problems with any country, I do like to blame Canada for a lot of things, especially since they "worship" the queen of england. Which makes no sense to me, get your own queen!
I can tell you that for every new signup we have we are really checking the information they are providing us. And flagging them based on bogus information. We have found that fake contact information is the number one detection of fraudlent accounts.
China does have a lot of people who attempt to commit fraud against us, unfortunately if they would only spend the same amount of time working on their sites as they do attempting to cheat parking companies, they would probably be very rich. Instead they are stuck with domains, that are worthless.
Donny