Just more fuel for the "America is wrong" crowd. They seem unable to discern the fact that the "insurgents" are non-traditional "soldiers" who do not obey any international covenants on treatment of prisoners, and have no defined government for whom they are fighting to defend. Anarchy is not a form of "government in exile" or any kind of "freedom movement". These are street thugs, and it is imperative to bring them under control.
Fear and intimidation work in conjunction with physical detainment. Takes the sass out of their attitudes and the wind out of their sails.