I've had an idea for decentralized authority for food production standards, and it seems that Nostr+badges might be a good protocol on which to build it! This would be sort of like L2 on nostr in that it would work on top of it. I imagine a local organization would authorize people to qualify (or disqualify) a source as a clean and reputable producer or distributor of food based on local standards and values (such as different levels of organic produce, specific exclusions, practices, etc.). This would also serve to make finding the food at the quality you want easier and more locally.
The immediate application is food, but the same idea would work for auto repair shops, professional services, construction and maintenance contractors, plumbers/electricians/roofers/handymen, etc, like a more specific version of yelp or Google reviews that is locally controlled.
Could be like "Nostr guilds" or some such name.