It seems to be a rather recent phenomenon here on HN (broadly speaking) and for me it falls pretty much in the same category as other overly familiar and rude language patterns such as 'AF' (short for 'as fuck') or 'tho', 'cuz', or 'w/' instead of 'though', 'because', or 'with'.
There is a rudeness in making it one of these faux-questions filled with implications instead of clearly stating what it is you want to say.
You did not offend me(with the first post) and I did not downvote you. I just explained, why you received negative feedback - basically missunderstanding. But talking about missunderstanding: I understand your last comment as snarky, unwarranted sarcasm. This I would downvote.
There is a rudeness in making it one of these faux-questions filled with implications instead of clearly stating what it is you want to say.