Trust design: perhaps an invite link shouldn't always be trusted (maybe it's a good idea to ask the user?)

A way to solve this with QR code contexts would be for you to generate a QR code with a “context” saying “met Bob in person at …”, show this QR code to who you think is Bob and this should result in the Bob contact getting a badge “scanned <met Bob in person at …>” QR code on 2025-02-11.