Ill explain why that is my opinion. The new websites show that they can see which rooms exist and which ones have activity. That means all the nostr based bitchat info is public activity. All you need from there is to build a logger that logs which users chat where and when they do. From there you can look at two things, who is talking in a regiin that isn't a popular teleport destination? And who is talking in regjons that are right next to each other. You'd only have to build an analytics program to figure that out. And with the chats public you may as well log those to.

Yeah