Data protection: Who really needs it?

Have you ever worried about sharing an honest opinion with friend on WhatsApp, or WhatsApp gaining access to the ‘encrypted’ communications? Have you worried about being listened to by the Facebook app, which it probably does not—they are just damn good at predicting your behaviour? Or, ever drafted a Facebook post, which you ended up discarding, which Facebook may retain regardless? Have you worried about sending photos via Snapchat, or Snapchat staff having access to photos?