https://www.theguardian.com/technology/2018/mar/20/facebook-cambridge-analytica-whatsapp-delete >Brian Acton adds his voice to Cambridge Analytica backlash, as US agency said to be investigating social network’s mishandling of data >Facebook’s troubles entered a fourth day with a rising chorus of people – including the co-founder of WhatsApp – joining the #DeleteFacebook movement as the Federal Trade Commission was reported to be investigating the company’s handling of personal data.