The debate between prescriptivism and descriptivism goes on.
Writer, actor, and comedian, Stephen Fry, suggests that there may be different strokes for different folks ... and for different times, occasions, and places. In other words, "you slip into a suit for an interview, and you dress your language up, too." But at home, among friends, you can "wear what you like linguistically or satorially."
Personally, I appreciate the rules of grammar and often depend on them. I enjoy words; I delight in language. But there is a time and place for everthing, including pedantic language and pedestrian language.