Can we get Wayfarer badges for reviewing certain types of nominations?
Steal this from 4sq/Swarm.
I get a badge for checking into a location a certain amount of times
You can select these types of things when making a new nomination on Pokémon GO (related, when do we get this on Ingress?)
So it could be that when you review a certain amount of American Restaurants you get a Bronze Stamp with an Apple pie slice on your Wayfarer profile and then go all the way to Onyx.