You would never tell someone to "learn to read" in face-to-face conversation, so you shouldn't here. Equally importantly: the comments you're replying to are productive; they are the actual answer to the question posed.
If someone told me to use google the way he did, yes I would tell him that in real life, except I'd say open your ears and stop being a duche. And no, the comment was not productive as it had nothing to do with my comment that he was replying to. It may have been productive as a reply to the guy who asked the question, but that wasn't me.
