Much of the discussion on privacy is premised on the implicit imposition of a private-property model on data or information that is subject to control/consent. This could have worked when all we were dealing with were relatively simple data like a social security number or an address. But the really interesting data are transaction-generated data (TGD). These necessarily involve more than one person. How can I give or not give consent to the use of my TGD, when multiple entities have been involved in its production?
Libertarians believe private property is sacrosanct. But ownership has never been absolute. In some countries ownership of land includes what lies beneath; in others it does not. Servitudes may detract from absolute ownership and so on. The situation is becoming similar with consumer goods it seems.