A quick explanation of my downvote: You seem to be mistaking "I know the answer" for "everybody should know the answer".

You could have written basically the same reply, but starting out with, "Hey, those are good questions. Because of my time in the academic world, I happen to know some of the answers. Let me see if I can help."

But instead you had to be a dick. That's undeniably fun, but contempt for people asking reasonable questions doesn't make them smarter; it just stops them from asking questions.