The first and foremost casualty of complete, unconditional, immediate transparency would be the truth. Think about it.
Wikileaks is not about complete, unconditional, immidiate transparency. Wikileaks does not actively spy on people or force anyone to be transparent. Wikileaks simply relays information that has been voluntarily divulged by someone who had access to that information.
If you "own" information that you think is highly sensitive then it's your own responsibility to secure that information. If you didn't take enough precautions, and the information leaks, you don't have the right to raise hell and supress its dissemination by violent means.