Re:Maybe it's deliberate strategy (Score 1)

more effective at blocking subversive communication

How does the rest of the world blocking outgoing (from China) SPAM email affect any kind of subversive communication? Even if the entire world blocks all email from all Chinese ISP, it still doesn't mean their subversive blocking efforts are any easier -- they still have to block the free access to subversive information (e.g. outgoing HTTP requests, incoming HTTP responses, incoming email, etc.).