Email providers, banks, and other entities commonly and increasingly use knowledge-based security questions as a backup or addition to simple passwords, for your own security. Or at least that’s what they say the purpose is. Should you really be revealing these things to someone whom you don’t know? From the New Aesthetic:
What Apple would like to know about you. (Screenshots by Chris H.) These are Apple’s new security questions for iOS. I thought the London 2012 site ones – “What’s your favourite colour?” “Who’s your best friend?” were bad enough.