I don't understand. Your rationale is because you have the PC version of the game, you shouldn't have to log in on the PS3?

So you're okay with the idea of someone breaking into your house, stealing your PS3, and using your account with reckless abandon?

imagine if the CIA had a login policy like this.

There are other reasons as well, you could have more than one service account, in which case you wouldn't be able to log in to the other accounts because you'd bypass the login screen.

Is logging in really such a horrible task that you can't spare less than 10 seconds for it?