1) Which is why the data shouldn't be accessible without a warrant and there should be stiff punishments if it is accessed without one. We shouldn't stop all the other advances that come from the technology of these sensors and the help they could provide in solving very real crimes.
2) There's already plenty of avenues for circumstantial evidence already, this is the reason we have lawyers and judges to argue over and prevent evidence that isn't solid
2) There's already plenty of avenues for circumstantial evidence already, this is the reason we have lawyers and judges to argue over and prevent evidence that isn't solid