Sunnyvale-based Yahoo announced Tuesday that every one of its 3 billion account holders was compromised by a massive data breach in August 2013, three times the number the company initially reported in 2016. Yahoo's announcement comes less than a month after the credit reporting giant Equifax revealed that a 3-month-old breach exposed more than 145 million customers' social security numbers and other personal information. And San Francisco's Wells Fargo, which remains embroiled in a fake-accounts scandal, acknowledged Wednesday that it improperly charged some borrowers mortgage extension fees. We discuss the ethical and legal standards governing corporations amid such scandals, and what more may need to be done to protect consumers' rights, property and privacy.