I'm looking a bit more into Stats NZ getting phone location data, and honestly it feels like the line from a Douglas Adams Novel where the plans were on display in a locked filing cabinet with a sign saying "Beware of the Leopard". To the point where if I hadn't tweeted about this, I wouldn't have known that buried deep in the terms and conditions you sign with a telco, they provide "anonymised network data" to third parties, who I only know the name of because they tweeted at me.