Maybe I'm dense but couldn't an attacker just put a qr code sticker over every space that all pointed to their own space? Then everyone would be paying for the

Maybe I'm dense but couldn't an attacker just put a qr code sticker over every space that all pointed to their own space? Then everyone would be paying for the attacker's parking. I suppose this is harder to pull off with a lower benefit, and a higher chance of getting caught (i.e. fast acting law enforcement would know which car was in the free space). To mitigate this, you might need space numbers posted. This is easy to verify that each space is different. But at this point, why even have a QR code?