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There were many documents that WikiLeaks released that seemed to have been released under the auspice of "full transparency" but really served no public good and inflicted a lot of harm. Releasing the names of afgan informants, cablegate, that airstrike video where journalists were killed (can't remember the name specifically), etc. I just don't know if I agree that the public should know everything.
Think about the case of the NSA--yes they were spying on Americans in egregious ways and overextending the scope of their mission and authority. But at the same time, we do want a lot of their methods to remain secret. They have thwarted many potential terrorist attacks since 9/11; and if we, and our adversaries, knew exactly how and who they were spying on--I'm sure Americans would be less safe.