Today’s invention is an introversion mapping application.
Introverts (probably one in three adults, but we tend to keep a low profile) would tag locations on their smartphones where there were few people and not much noise. The tags might link to local realtime photos and recorded sounds.
This would include information about the best times to avoid crowds so that other introverts could then go there preferentially.
When the locations began to get more popular, the app users could individually reduce the rating for a given location.
This is all a bit like the El Farol problem I’ve mentioned before.