I care not one jot if people write or speak poorly. I sleep soundly at night knowing there ARE rules to follow and y'all can dismiss them at your blue- penciled peril. Contrary to the cant of the "moderate prescriptivists" (really? Is that like using 67% birth control?), the spoken argot does NOT determine the standards for correct written English. If that were the case, this world would sound and read like A Clockwork Orange. The descriptivist apoplectics and apologists out there want it both ways. It's like saying: "Well, this sign doesn't really mean 'Stop'--after all, there aren't any cars in the intersection!..." And those double yellow lines in the road? That's just a guideline--no need to really pay atten--SMASH!
The error of ... viewers with alarm is in assuming that there is enough magic in pedagogy to teach ‘correct’ English to the plain people. There is, in fact, too little; even the fearsome abracadabra of Teachers College, Columbia, will never suffice for the purpose. The plain people will always make their own language, and the best that grammarians can do is to follow after it, haltingly, and often without much insight. Their lives would be more comfortable if they ceased to repine over it, and instead gave it some hard study. It is very amusing, and not a little instructive.