Playing with their minds does seem to be the least repugnant form of torture and, within reasonable boundaries, might even be the most feasible. It would have to beat the rack, the iron maiden, a cat of nine tails, a human shredder or a rape room. And, IMO, it's WAY out there in front of a beheading. The thing that bugs me about any of these things is that - whatever selection is made while it might do the job it has the added ability of putting us right down there in the same reprehensible muck and mire as the terrorists. So, we really have to be cautious and diligent in our methods and try very hard not to become the thing we hate.