> I still have this pipe-dream of an augmented reality system where you can walk through the grocery store and it will superimpose a warning label over any brand connected to a company on the individual user's shit-list.

There are boycott apps that let you scan barcodes, e.g.:

https://play.google.com/store/apps/details?id=com.boycat.app

But there are a ton of others.

It is a natural extension to add this to AR/MR when the time is opportune.