Thadeus, sorry, but I am unable to see your point of view. If I understand you correctly, you are stating that hacktivism is ok when the hacktivists possess the moral high ground. Yet "moral high ground" is, I would posit, a very relative term - relative to the individual and there is no standard.
For example, who has the moral high ground: US hackers who shut down Islamist (not Islamic) web-sites that promote violent extremism or Islamist hackers who shut down sites the promote the US (or Western) view of democracy? I would again posit that it depends on the view of the individual. So is it ok for one group to be hacktivists and not the other? Would that not smack of hypocrisy or a double-standard? Or perhaps both views are wrong but there is another that would be ok?
The essence of the argument is that the act itself is wrong, not the reasons behind the act. "Moral high ground" is irrelevant relative the the act itself. I may support the views of some of the hacktivists, it does not mean I support their activities.
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As far as Tiananmen Square, you should talk with many of the people from that generation, both inside and outside of China. Personally, I expected that many people inside China would condemn the students for fear of government retribution and those outside would be in support of the students. But many of the people I've talked with, including some who protested with the students during the Beijing Spring of 1989, have said that the government was right in suppressing the demonstrations - both in and outside of China. Not in the violence of the act itself, mind you, but in that the government had to re-assert itself for fear of losing sovereignty. Too many Chinese lived through the chaos and anarchy (luan) of the Cultural Revolution and there are many who, now a generation removed from 1989, have a more objective point of view of those events than the picture of a man standing in front of a tank in Changan Boulevard as commonly seen in Western references to the spring of 1989. Sorry, I digress and this is probably best handled in a separate forum if you want to continue this line of thought...
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"I am not young enough to know everything."
Oscar Wilde (1854-1900)