As we've seen in Tunisia, Egypt, Bahrain, Yemen, China, Libya, and others, the government having the ability to block internet or phone access for some or all users is going to get many people killed one day.
There is a lot of ground to cover before the government of NZ or its neighboring nations even remotely resemble the governments you've listed, and alarmist attitudes contribute nothing to reasoned debate.
And how do they get this power to censor? By blocking other things (porn, copyrighted material, etc).
Censorship and enforcement of copyright protection are completely different topics. If you believe anyone should be permitted to distribute materials protected under the copyrights of others without permission and without repercussions from a court system designed to handle such matters (which NZ actually has, if you care to visit the link I provided earlier), you're welcome to speak against copyright in principle. However, it is the law, whether you like it or not.
Even nuclear secrets aren't dangerous enough to warrant a system of censorship.
Speaking as someone who has served aboard an Ohio class submarine, I cannot stress strongly enough how incredibly wrong you are.