This week we talk about QR codes, security theater, and hacking HBO. We also discuss Dunbar's Number, getting free meals for a year, and being rude to robots. For more information about the podcast and to view the copious show notes, visit letsknowthings.com. Become a patron on Patreon. My new book Becoming Who We Need To Be is available as an audiobook, paperback, and ebook. This episode was sponsored by Everlane & Audible.