"Everyone holding information about us, be it companies or other consumers, can compromise our privacy by passing on personal information that we might not have volunteered ourselves. Privacy is, therefore, a multiactor phenomenon. As technology advances to facilitate passive information sharing over an expanding range of devices consumers who hold and collect information about others, such as their family or colleagues, pose an increasing threat to these others’ privacy." (Your Data Is My Data: A Framework for Addressing Interdependent Privacy Infringements, SAGE Journals, 2019, Kamleitner and Mitchell)