Even if you left the door of your house open, it wouldn't be legal for me to go inside and take your TV in protest.

Frankly, you're just torturing some unclearly defined terms ("Information Published on the Web", or "Expressly Designed Feature", or "it's up to a Remote System to respond appropiately") to make a point. Thing is, most of those terms are not legal, well defined terms; and when they are, your interpretation is lacking. You'd have a hard time convincing any judge that a company expressly desired to publish email directions of all of their customers, via some opaque and undocumented URL manipulation.

Disclaimer: I don't agree with weev's conviction, and some of its aspects are outrageous ("conspiracy to access a computer without authorization"?). But this "it was public information" angle is just bullshit. It's just badly reasoned.