Comment by scoot

Nice idea. Just some nitpicks:

"Visit QR code to:" – You don't "visit" a QR code. Perhaps "Scan the QR code to:"? (Optional grammar fix included.)

"Comment on the QR code" – "Leave a comment"? (Unless you really want a comment about the QR code! ;-) )

I just get a busy spinner when I scan the QR code in the screenshot. A working live example would be nice.