The purpose of using your QR code is the simplicity of scanning it with a smartphone camera, which will take the user to a website, app or something similar. Using the QR code in any other way is no longer practical. If there is a link, you click on a link.
I was not talking about typical link for clicking, but QR codes are just holding information and that can be address, link, text or anything else.
In my opinion easy decoding QR codes should be available even without scanning with camera, not just in this forum but everywhere.
The only real use I see is creating a payment on a PC and paying from a mobile wallet. But who does that on Bitcointalk?
For payment probably nobody, but they could be used as alternative address format for tips, donations or for forum profile page.
I do believe, however, that QR codes are very useful if you have services that deal directly with the consumer - like restaurants (to scan the menu link), parking machines (to grab the parking ID), devices (to easily scan their SN number), gather feedback from events more easily, etc... Personally, besides 2FA, the feature that I also tend to be using the most lately is sharing the Wi-Fi password by QR code.
I agree they have their use case but I dont like using QR codes for everything, and I already said that I had issues several times with QR codes not being recognized or they showed wrong information for some reason.