Using optics to detect radio signals, perhaps? https://www.technologyreview.com/s/611977/get-ready-for-atomic-radio/ https://www.technologyreview.com/s/611977/

Using optics to detect radio signals, perhaps? https://www.technologyreview.com/s/611977/get-ready-for-atomic-radio/ https://www.technologyreview.com/s/611977/get-ready-for-atom... Also, a tongue in cheek answer, being able to get a company into big trouble for mishandling data via the GDPR ;-)