Identity theft has become common in the United States. The Federal Trade Commission got 1.4 million reports of it last year as the pandemic worsened the trend. Incidents in 2019 were half the number reported over 2020 and 2021 — making identity theft the fastest-growing crime in the country. From being bilked by your twin to decadeslong struggles to prove fraud after losing a wallet, here are some of the scariest stories. Some might keep you up at night, but there are lessons about how to protect yourself, too.