Location data is truly very powerful, this has been shown already. As an example: I live in a large apartements complex. I mostly always see the same people, b

Location data is truly very powerful, this has been shown already. As an example: I live in a large apartements complex. I mostly always see the same people, because we have the same in/out hours and days. There are people I know who live here that I almost never bump into by chance, sometimes not even once in a year. This give an idea of how timestamped location data is personal and identifies you. This is quite impressive if you think about it. That's the reason why Google keeps pinging you if you change the location privacy settings on your Android phone.