Ask HN: Joking aside, does anyone actually use QR codes?

I've seen previous discussions of QR codes here on HN, and in one of those discussions someone linked to the Tumblr "Pictures of People Scanning QR-codes," which only displays the message "No posts yet." In my own daily life experience, I have yet to see anyone actually scanning a QR code, and don't know of any local friend who recommends using them for anything, so what is the use case for QR codes? Who is using QR codes, for what?

I have tried to use them and have not been able to make any of them work.

I've never scanned one other than out of curiosity the first time or two that I saw one. I wasn't the target demo to be scanning them, I just wanted to know that it worked I guess. I've never scanned one otherwise despite it being "so convenient" to do so. I see very little value in QR codes and expect them to be gone soon. I think they've been on their way out since they were first thought of.

I was looking at refrigerators at Best Buy a while back. Every appliance label had a QR code. I scanned several because it linked directly to the product page on the BB site with customer reviews.

Most QR code lead to brand names site. Like California milk, Nike ... And so on. You never need them.