I think this is a great illustration of the privacy (and thus related legal) issues that simply aren't being addressed in the research and commercialization efforts thus far. We saw a little of this with Instagram's photomap, that people's locations were being "outed" because they were tagged in someone else's photo and that person chose to make their locations public, but it's going to get more complicated before it makes more sense.
I think this is a great illustration of the privacy (and thus related legal) issues that simply aren't being addressed in the research and commercialization efforts thus far. We saw a little of this with Instagram's photomap, that people's locations were being "outed" because they were tagged in someone else's photo and that person chose to make their locations public, but it's going to get more complicated before it makes more sense.