a glut of companies are lurking in the shadows of the Internet, gathering your data to sell it to anyone who’s willing to pay the price. These so-called “data brokers” can easily follow your digital trail by using your browser cookies and other ingenious tracking methods.
And it’s not just general statistics, demographics, or overall trends that they’re selling. Many data brokers sell dossiers on individuals, complete profiles that include your name and personal information, without your knowledge or consent. These dossiers can include sensitive information such as medical history, political and religious affiliations, and sexual orientation.
There are no regulations for companies such as these. If you want to keep your personal data private and not let anonymous companies bid over it, you have to take matters into your own hands to block their efforts.