My friend got his account hacked too. He has been unbanned but Philly hasn't change his email yet so he can fully have access too his account. In other words his account is unbanned but the hacker still has control of his account.
The people who say they don't care about GAuth, are the people who obviously do not care for their account. I value online security, and so should everyone else.
Basically it's an app you install on your PC / Mobile Device, and with it you will get a secret code generated every 30~seconds. So for example if someone had your password, they wouldn't be able to login without that secret code/key from your GAuth app.