This is a warning, not a recommendation. I’ve been a TV critic so long that I remember when it was natural, and easy, to fan the flames of outrage whenever a local newscast would spend part of its time doing a feature story obviously tied to one of its prime-time offerings. That practice has become so accepted, nobody even blinks any more, not even TV critics. But tonight’s prime-time network special, presented under the auspices and corporate flag of NBC News, is called Why We (Hear