Genuine question: am I the last person in the world who still has my blue ticks on? In the early days of WhatsApp, if someone had gone into their privacy settings and turned them off, so you could never be sure when or even if this person had read your message, that told you all you needed to know. No blue ticks = red flag. Here was a slippery, sneaky individual, not to be trusted under any circumstances. As opposed to those of us who left them on – honest, noble, open books with nothing to hide. No blue........

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