Yahoo was hacked.
Yahoo also has made it impossible to delete a yahoo account (or Tumblr account)

Yahoo has 24 hours or respond and fix the glitch or the video showing that it is IMPOSSIBLE to delete accounts and information goes to Mashable, HuffPo, and everywhere else. Your class action lawsuit for the hack is probably in the millions.... because you've prevented users from deleting their accounts or information, the class action suit will be in the billions.