"It is time. #deletefacebook."
After reports of Cambridge Analytica using Facebook's user information came to light, people across social media have begun to urge others to either #DeleteFacebook or #BoycottFacebook in response.
One surprising voice has joined this movement - WhatsApp co-founder Brian Acton.
Mr Acton left the company in 2017, three years after Facebook bought WhatsApp for $19bn (£11.4bn at the then exchange rates) in 2014.