I'm not offended by most PC speech, just annoyed, some of it is jarring - not all, but some. OTOH, some of it actually makes sense to me. Only offended when an individual presumes to give me instruction on how to say what I want to say. It's usually followed immediately by complementary and equally friendly and helpful advice in the form of a simple program downloaded to his auditory interface for convenience:
step 1. Loosen sphincter.
step 2. Apply crowbar as lever in vigorous, forceful motion.
step 3. Extract skull.
Unless specifically requested to edit someone else's work, I don't comment on other people's spelling, diction, grammar, or style any more than I'd comment on their clothes, personal grooming, or sexual proclivities.
That being said, I think it's perfectly reasonable, aiming for clearer, formal communication, to use language that more accurately conveys the message we want the listener or reader to receive. OTOH, for casual conversation and casual writing (and most conversation and most writing IS casual), I think we ought to speak in the manner that feels comfortable to us. However, there's a difference between asserting "I will do X, because of Y" and "You should do X" with sometimes vague, but usually not-so-vague overtones that failure to immediately adopt X indicates that one shares membership in some nebulous super-class with klansmen, republicans, rednecks, and miscellaneous other bigots (a bigot being anyone whose convictions differ significantly from the taxonomist).
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