NBC recently made the gutsy decision to renew this fall the superb but little-watched Friday Night Lights, its rookie drama about high school football in Texas. In a season marked by quick exits for highly promoted serial dramas with big stars — notably Fox’s Drive, ABC’s The Nine and NBC’s own Kidnapped, all of which were quality shows — this is a remarkable event. The renewal is especially noteworthy because, in its own laid-back way, Friday Night Lights is one of the most politically incorrect shows on television. Maybe 24 hero Jack Bauer drew all the fire from the ACLU....