Jeremy Wales said something quite right during the conference: The block of Wiki will not only inhibit the information flowing into China, but also inhibit the information flowing out of China. Nobody in the mainland China could update the Wiki in the way they want, which means they will not involve in a internationl world where everyone has the right to speak.
A little bit like China's foreign policy right now. No one talks too much. In some extent, it is right; but in other extent, it mean the country loses its freedom of speech to the other countries in the world. Better to think about it.