https://phys.org/news/2018-11-cambridge-analytica-whistleblower-online.html > Wylie earlier this year said data from millions of Facebook users was used by Cambridge Analytica without their knowledge to help elect US President Donald Trump—a claim denied by the company. > In his address at the Web Summit, Wylie also called on data scientists to be subject to an ethical code just as doctors, nurses and teachers are.