Cisco knew how unethical thier actions are. Their actions can cause financial harm to others whom there sites have been blocked by Cisco's technologies.
China has the most people in the world country-wise. That is missing out on a lot of business opportunities. Businesses whom their sites have been blocked in china might suffer as a result of their actions. Those businesses should have major grounds to sue the crap out of Cisco.
You can't blame cisco for china being a communist country.. Cisco was merely hired to do the job. If that is even the case.. Is there even a news article or anything to prove it was specifically cisco?