Tech Talk,
I think that "proper grammar" has generally been a matter of class and standing rather than a matter of effective communication. For about a century, "grammar teachers" in "grammar schools" (aka elementary schools) taught children how they ought to speak and write, differentiated from the way they heard their parents and friends speaking and writing.
I think this is purely a matter of class, and class apsirations. Lanugage evolves. And it evolves in ways that people who uphold standards find extremely distatsteful.
Well, I have to confess that I buy into what the grammar people taught me. When I see a website with dozens of non standard usages scattered all over the place, I subconsciously lower my level of trust in that website. For almost thirty years now, I've tended to disparage people who spell the word "lose" with two "o"s instead of one. But that's just my bias.
In addition to changing patterns of education, there's also a generation gap. There are usages among today's teens and young twenties that are totally beyond my horizon. There are those who would claim that these kids are simply lowering the level of literacy, and there are others who would say that I'm simply out of touch with the cool people.
When I'm thinking clearly, I discount both of those attitudes.