Okay, you just hit a buzz-phrase for me.
There are a lot of restrictions being put in place on anything you can think of, all in the name of "If we can save just 1 person/prevent 1 accident/ect then it was worth it".
As you might imagine, I find this train of logic to be overreaching. I find myself to be fond of my personal freedom, and the suggestion that my activities should be limited, because it would be in my own best interest, causes me great distress. (For instance, who in the heck has the right to tell me that I have to wear a seatbelt? No one, that's who.)
No amount of restrictive policy is going to solve all the world's problems, it is just going to reduce law-abiding citizens to zombies with little real choice.
As it pertains to torture: The odds of someone who has nothing to do with, oh, let's say a bomb threat on a US/UN/(insert favorite country/orginazation here) embassy being detained and interrogated are pretty slim. The key point is, we wouldn't be out to tourture people, we'd be out to save innocent bystanders. I think intent is important in this instance, as, from a morality standpoint, it makes all the difference.
Nobody intends to tourture an innocent person. You can bet your ass they intend to torutre someone who is withholding information that they believe, in good faith, could be used to prevent a large act of terror/violence/kitty killing/ect.