They've been played in stores since the day after Halloween, and if shoppers have to hear "Silent Night" one more time, it will be anything but a silent night, because the night air will be pierced with screams of sheer frustration. The little drummer brat drumming, Bing crooning away, chestnuts roasting someplace - look, these songs are good for about twenty minutes tops. In large doses, however, they tend to induce insanity. Where's robot Santa when you need him?