Facebook has been caught in a "leak door"

Facebook has been caught in a "leak door". According to several media reports, Cambridge Analytica obtained unauthorized access to 50 million Facebook users’ data, which was used to build models to intervene or “manipulate” elections or pre-referendum intentions in many places around the world by means of precise advertising and other means. Coincidentally, Merkel's party admitted to buying voter data from Deutsche Post for advertising purposes. Data leaks, data purchases, and "manipulation" of public opinion have warned of the hidden dangers of personal data.