Stalking isn't the only malignant usage: tracking data can also be used, for example, to determine when someone is away and their home can be safely robbed. Ag

Stalking isn't the only malignant usage: tracking data can also be used, for example, to determine when someone is away and their home can be safely robbed. Aggregation of personal data imposes negative externalities whose costs are borne by individuals. As the aggregation accelerates, so does this problem.