C441 - It's also not just the recording.
A couple of weeks ago I was in a state with no recent COVID history where I was eating breakfast outside and the waitress came around and proffered me the clipboard and pen onto which I was to write my name for contact tracing.
I duly complied, and commented somewhat wryly, "What with the same pen all the everyone else has used?" She looked at me blankly, and I said again. She had no idea what I was on about.
The most dangerous states in Aus for an outbreak are the ones where the public - luckily - has not had to be worried about the virus transmission and don't know how to take the most simple precautions. Go to hotels around the rest of the world these days and there is a pile of new clean pens and a basket of used pens at reception. No it's not perfect but it's another 90% barrier. No menus at restaurants either - all QR. Another layer reducing transmission.