The curious ones should just stop scanning all of the QR codes that they see. 
So it's not only me right? There are others that just like scanning QR codes just to see what's behind it. That has been one thing I liked doing in the past, don't know how I managed to stop doing it, but I still get attracted (maybe "fascinated" is the word) by QR codes.
I still prefer to send and receive Bitcoins through giving the address than giving and asking for an address QR code.
I was leaning towards scanning codes when I found out (thanks to this forum) that there are malicious software that can change the address you copied to send Bitcoin to and make it look very similar. Somehow I also found out about the risk of QR codes so I decided to stick to the address but take more time to verify the address.