The parking here in Nashville got privatized (and made much worse, even 1 minute costs $2 now and no more free times/days) and the pay method uses a QR code. I

The parking here in Nashville got privatized (and made much worse, even 1 minute costs $2 now and no more free times/days) and the pay method uses a QR code. I am amazed no one has gone around putting fake QR codes on the signs. They'd even work better, the non-standard codes they printed don't really scan well.