While one's digital footprint may infer personal information, such as demographic traits, sexual orientation, race, religious and political views, personality, or intelligence[17] without individuals' knowledge, it also exposes individuals' private psychological spheres into the social sphere.[18] Lifelogging is an example of an indiscriminate collection of information concerning an individual's life and behavior.[19] There are actions to take to make a digital footprint challenging to track.[20] An example of the usage or interpretation of data trails is through Facebook-influenced creditworthiness ratings,[21] the judicial investigations around German social scientist Andrej Holm,[22] advertisement-junk mails by the American company OfficeMax[23] or the border incident of Canadian citizen Ellen Richardson.[24]