Looks like https://www.gwern.net/Death-Note-Anonymity https://www.gwern.net/Death-Note-Anonymity , which has a lot of references and side notes more relevant to

Looks like https://www.gwern.net/Death-Note-Anonymity https://www.gwern.net/Death-Note-Anonymity , which has a lot of references and side notes more relevant to this story than to Death Note per se, e.g., > The researchers generalized their Netflix work to find isomorphisms between arbitrary graphs (such as social networks stripped of any and all data except for the graph structure), for example Flickr and Twitter , and give many examples of public datasets that could be de-anonymized—such as your Amazon purchases (Calandrino et al 2011 ; blog).