With all of the recent security issues with Facebook, I think this advice from Krebs on Security is probably some of the most relevant information on the internet today.
I’m willing to bet that a good percentage of regular readers here would never respond — honestly or otherwise — to such questionnaires (except perhaps to chide others for responding). But I thought it was worth mentioning because certain social networks — particularly Facebook — seem positively overrun with these data-harvesting schemes. What’s more, I’m constantly asking friends and family members to stop participating in these quizzes and to stop urging their contacts to do the same.
On the surface, these simple questions may be little more than an attempt at online engagement by otherwise well-meaning companies and individuals. Nevertheless, your answers to these questions may live in perpetuity online, giving identity thieves and scammers ample ammunition to start gaining backdoor access to your various online accounts.
These quizzes seem innocuous, but the data that can be harvested from them is enough identifiers to get into your phone account, your banking, your credit cards, and more. It seems harmless to fill in a answer but you are putting yourself at risk by exposing that history to data mining.