I have just witnessed a masterpiece. A man with a printer, a dream, and apparently way too much free time has done what most cybersecurity professionals spend decades trying to achieve: he hacked the human condition — with stickers. Here’s the play:He prints QR codes — just generic black-and-white codes — and pastes them perfectly  over existing ones in the wild. You know, menus, vending machines, parking meters, those tiny “scan me” squares that have become the universal doo