I wonder if #PlusCodes could viably be used as hashtags to generate some sort of geographically #local feed.
The first six characters of a plus code denote an area of roughly 5x5 km², so if I take a full plus code like "9F4MG98H+G3", and then create a hashtag using the first six characters, like #9F4MG9, adding that hashtags to posts would allow others to find activity in a certain region.
I found a post earlier today, suggesting basically the same thing, with one interesting difference.
@lapingvino suggests to prefix the code characters with "geo", for hashtags like #geo9F4MG9 - which is nice because it hints at the hashtag being some sort of location reference even for users not yet aware of this idea.
Just to brainstorm a bit, possible alternatives could be:
#geo_9F4MG9 (underscore for readability)
#local_9F4MG9 ("local" to highlight the local nature)
#at_9F4MG9 (short!)