Single post in Account Breach incident

I am definitely against Security Questions being a form of two-step login because people answer these without thinking ALL THE TIME on those Social Media pics of "What's your Angel Name?" or whatever. That said...Blizzard has a neat little two step, where every time you attempt to log in, it displays a code on the screen. That same code is displayed on the Verification App on your phone. And you simply tap "Accept" or "Decline" to verify that it's you logging in. That would require members to sign up using their Mobile phone, and most people don't want to give out any personal info to sites (despite the fact that ALL of your info except passwords is public knowledge anyway). It would likely also cause problems for players who share a single Cell AND IP. Although, it could be sent to Email.