Extraordinary rendition is not only one case. It is hundreds if not thousands by now. Particulars of this case are irrelevant. I see. So when you posted the story about Arar, you had no interest in whether Arar was honest or a liar. In the future, when you post similar messages, I'll just assume you have no interest in the veracity of the case - only just how much it gives you a chance to rip the CIA.
Particulars are everything.
Practice in itself is illegal. Illegal - by what law? By what authority?
Stoning for adultery in most cases takes place in remote/rural areas where authorities have very little or no say at all. (Locals still live under more or or less self imposed sharia law/customs. ) So that's your argument? That "customs" get in the away. That kind of cultural relativism is usually reserved for two-bit anthropology professors, and it's pure rubbish. And by the way, In 2007, Iran's Supreme Court upheld the conviction of the woman.
Extraordinary rendition is kind of simillar in nature. It is happening far away from public eye, and again group of people (CIA) takes law in their own hands and become both judge and executioner. I wonder if you're aware how many terrorists have been released from Gitmo Bay and placed right back on the battlefield.