At some point, if they become too hostile to the internet in general, they'll find they start having problems with peering relations. There aren't a lot of things you can use to threaten China with, they're your typical beligerant government. But if they find themselves with drastically reduced internet access, I believe that WILL influence their policy. China's economic power hinges heavily on its internet access. Belligerence only works when you can say "I don't care what you do", and truly
mean it.
