Today, there is no getting away from the electronic hearthland. Commen- tators may routinely misinterpret one of the more widely circulated statistics about television-that the average household has a set on more than seven hours per day-to mean that the average person watches that amount. (It is no mere pedantic detail to note that a set being on does not mean that it is being watched.) But even the correct figure of four hours a day is nothing to trifle with. Television watching is second only...