[Retric]

I was more thinking a FSO link ~2km into the middle of nowhere vs having one of those sitting in someone's house. But directional wifi is probably safer as it's also not going to look strange to a spectrum analyzer.

However, if you want to catch individual usage in urban areas, with guys on for that's going to easily be into the 10's of of billions as users don't need to keep them on 24/7. AKA within the capability of nation states, but not without significant effort.