Jeffrey Maas thought he was being a good citizen, helping to fix a mistake that he was told was going to ruin someone’s career. His naivete led him into a common scam that cost him most of his life savings. Maas, a 76-year-old retiree living in New Jersey, read the e-mail that millions of people have received: “Thank you for your order of Norton anti-virus software … for $691.85…If you would like to confirm or cancel this subscription, please call…” Unfortunately, Maas did call to cancel the