You may not own the physical footprints, but you have a fundamental right to the personal data encoded in them. A corporate service collecting footprints, offering insights and analysis about those who made them, creating maps and profiling their interests based on where they walk, does concern the basic right to data privacy, even if the whole thing is analog, and not out-sourced, and uses no cookies. This is why i compared it to licensing. A musician may not own every physical record, but they have rights to the music they created. Not a perfect metaphor, but good enough to better understand the concept.