@sundogplanets
The main problem I have with QR codes is how opaque they are. For any given code:
-Who generated it and is it therefore trustworthy (tw).
-What other sites does the code transit while in use? The generator could be tw but are the cdns used equally tw?
-Is malware, phishing, or data harvesting injected along the transit chain?
-How do you *really* know where your browser is going before you use the qr code?
For me using a qr code in general is asking for id theft.