I used to be very judgmental about grammar, spelling, punctuation, etc., and for the most part I still am, but I did tone it down a bit after meeting someone who is even more of a Grammar Nazi than I am. She was in her 80s and had spent her life teaching English. She berated me for using the word "okay," saying that young people these days are too lazy to use TWO words: "all right." My response was that language changes over time, and we're not all speaking like Shakespeare anymore. (I did look up the history of "okay," which is pretty interesting.)
So I guess the question I have to ask myself now is, who am I to think that I'm the one who gets to decide what's "wrong" and what's just "new." I don't have a perfect answer, but some of the comments above have addressed this to some extent.
I also catch myself using "hopefully" in the wrong (common) way, and I hate that I do that! Unfortunately I learned the wrong use first, and I haven't found a good substitute. "With any luck" is only one syllable longer but seems more clunky.