I recently went to M-Restaurant in the Migros Marktgasse in Bern. Some Covid-cross-thinkers are scribbling the QR code on the table so that the convenient online registration no longer works. The ballpoint pen (with fastening cord) is placed right next to it. Unfortunately, you have to share your everyday life with people who sabotage you like that. If at least the QR code was at the other end of the table, the cord would be too short to scribble and you could check in and out contactlessly again.