If not: I think you'll find find the HN community doesn't react well to either stealing content or complaining about the (quite reasonable, in this case) cost of people's products.
I wasn't. I can't afford a couple grand for a dozen power point slides. If somebody wants to share it then I would be thankful, definitely won't view him as a thief. You are not an ambassador for the entire HN community and their view on digital copyright or ethics for that matter. People complain about cost of people's products all the time on Show HN if you haven't noticed.
If not: I think you'll find find the HN community doesn't react well to either stealing content or complaining about the (quite reasonable, in this case) cost of people's products.