I’m fully aware of the privacy concerns here; but that wasn’t the topic I was engaging in.
I’m saying that practically, being within a radius as the bird flies does not make you functionally “within the area” when there’s a huge z axis in a city.
When someone robs the retail of the ground floor of a high rise, there are many people who were right on top of the crime scene measured by lat/lon but were actually 10 minutes away by foot, hundreds of feet away in actual distance, and in no way aware it was even happening.