Wouldnt those people have to get your username and password still? and if they are in the same house and someone hacks your account wouldnt u just like kick their ass?

Or you could just not share your password...

Or they could just use the Parental Controls built into the Battle.Net account.

@ koleckai - I actually forgot about parental controls. I remember this being discussed on The Instance around the time authenticators started becoming pretty popular, but since it requires an authenticator one way or another to access account stuff, my point is kind of moot.

@ yoshi - yes, I would, but by that point the stuff would still be gone. There's a lot of people who live with people they don't necessarily trust, so the opt-out would be great there.

If you live with people you don't trust, what is stopping them from stealing your authenticator? Bad people in your house can still screw you over with or with out a prompt for an authenticator.

You can try not sharing your password, but that won't stop someone from guessing it, and it does no good if you happen to download (or have a security hole in your computer and someone uploads) a keylogger. Because the authenticator is a random 6 digit code that changes every several seconds, it's virtually impossible to guess.

If the answer was as simple as "don't share your password" then we wouldn't need authenticators to begin with, would we?

Under the new way it would prompt a code every time your PC lost connection with the IP. Basically all you had to do was restart it or shut it down and you would get a prompt to enter in your code. So that is your option until they implement the opt out. I would imagine if you are that worried about account security you shouldn't mind a simple restart should you?

@Iirdan It's not tied to your IP. Go on, try it, switch your PC over from your home connection, say over your phone, or restart your router if you don't have a static IP. It won't ask you for your authenticator code.