share your progress with your friends

We’re not quite sure what’s going on here but it appears that if you neglect to switch over the privacy settings on one’s pedometers, they’re quite good at tracing out one’s route, whether that be a running path through the woods or the patrol of a military installation whose layout or existence was supposed to be a secret. This discovery—which is supposedly readily available to the public—of one’s anonymous but unintentional heat-maps reminds me of how the Soviets monitored NATO troop movements and nuclear arsenal deployments with a great degree of accuracy by careful and constant water sampling that tracked an army’s vector by detecting urine levels in streams and rivers.