Recently at a family dinner we established that any kind of unsolicited contact that falls outside typical conversation - Asking for money, sending money, prett

Recently at a family dinner we established that any kind of unsolicited contact that falls outside typical conversation - Asking for money, sending money, pretty much anything with money - you must say the word that only people in our family would know. Ironically, this would be a good application of AI, where the AI listens in on their calls, and will flag conversation that warrants the keyword being said.