The post discusses the phenomenon of NFC (Near Field Communication) polling that occurs when a smartphone's screen is woken up or unlocked. It raised questions about whether NFC carries a unique identifier (UID) similar to Bluetooth and the implications of this for privacy and security. Comments from users indicated a creative interest in the potential for using NFC UIDs in storytelling, while some expressed surprise at the existence of NFC transmissions during such actions. This prompts further investigation into how widespread this capability is and what information is transmitted during these interactions.