Many might’ve seen the Australian ban of social media for <16 y.o with no idea of how to implement it. There have been mentions of “double blind age verification”, but I can’t find any information on it.
Out of curiosity, how would you implement this with privacy in mind if you really had to?
At minimum this would still result in the GUIDs being associated with the physical location from where they were taken. Unless you used a different GUID for each interaction, the GUID would also link your interactions together (into at minimum a shadow profile, but for most people it would end up including their names).
EDIT: Why do the GUIDs need to be unique? All they need to establish is that you’re of age. You and I and a million other people can use the same code. Just don’t share them with kids.