I love how developers are all so lovingly inconsistent. On one hand they swear up and down that binary formats are shite and now human-readable formats are the new thing (or at least that was the story a few years back with various markup languages and json) but now, for those stupid fucking idiot users opaque formats that require a functioning camera line of sight clear to a piece of paper are now IN. Minimized urls are too passe, I suppose?
And it's great too, because scammers and hackers are now dropping QR codes on the ground or leaflets, or placing stickers on the QR codes that dot the landscape (like on public info posters or ads put up in HDBs) so poor folks who have learned that the QR code is how you do things now just load up the QR codes without asking. Again, opaque formats are NOT good for many reasons, ease of hacking/social engineering is one reason obvious reason! Of course you can put a sticker on poster on a url but it's easy to recognize the difference between mysite.com/about and something else vs qr code 1 and qr code 2.