"For example, this summer, Wired noted that Jane Harman (D.-Calif.), chairman of a House subcommittee on intelligence, information sharing and terrorism risk assessment, had left her District residence’s wireless networks open."
If your WiFi is open, anybody can read your traffic at will. That’s why Google itself began encrypting the logins of Gmail users years ago, a measure that ensures that an eavesdropper will pick up gibberish instead of usernames and passwords.
But if you think that your unsecured WiFi’s privacy issues ended with Google’s surrender, you are a fool. The people you need to worry about don’t drive around neighborhoods in cars equipped with bulky camera rigs, and they won’t apologize for eavesdropping because they’ll be too busy logging into your accounts.
A real privacy breach doesn’t involve a remix or collection of data that’s already out there for anybody to see – even if using the words "hack" or "breach" in a headline makes the story that much juicier.
A real breach exposes private information you tried to keep confidential, in ways that risk the loss of money or security or otherwise fairly earn the adjective "Orwellian."