Yup, I know people that have been telling that they like doing these especially those products that has them. While with such products it can be genuine and safe because they've got physical entities. But you'll never know here this curiosity or practice will bring you. Much better to just stop doing so since it's not mandatory at all.

IMO, if you're going to scan QRs and you want to send it to someone. The best thing to do this is to do it face to face, when you can actually see that the QR code generate came from the actual wallet of the receiver.