This kid’s parents put him up to this. They were off camera with protest signs. It never really caught on, because, for one thing, you need things like barcodes to get groceries to eat or to sign up on your facebook account to spew more conspiracy theories. “The cashless system” has exploded the last twenty years with paypal, quite a few crypto-currency venues and many apps to facilitate the movement of money, resulting in more freedom and, like the sign says, the elimination of privacy.