Just How Seriously Has Yahoo Been Taking Security? One Billion User Accounts Exposed

Yahoo continues to lurch from one car crash to another, each managing to top the last in scale. Having previously confirmed that half a billion user details had been exposed in a leak (although failing to do so as part of its sales negotiations with Verizon) Yahoo has taken to its corporate Tumblr blog to announce another leak this time affecting one billion users.

I mean has the company actually been implementing any kind of security at all?

If you haven't already done so, backup then delete all your personal data from Yahoo, close your account and never, ever got back again.