Even if someone isn’t systematically tortured, simply being locked away without the opportunity to legally challenge your incarceration is extraordinarily damaging, mentally.
Why someone would think it's "helpful" to violate someone else's human rights, to plunge them into an Orwellian nightmare, to do what is being done to those poor bastards at Gunatanamo(sp?) bay(well, minus the water boarding) is beyond me.
In fact, is not holding someone against their will, without a right to challenge this, in itself not torture?
Has their ever been an institution that held humans in this form of bondage that has not also engaged in further abuse of their detainees? I doubt it. When one is held in a position of powerlessness, exploitation of that powerlessness is inevitable.