It's not just hacks that put your personal data out in the open -- sometimes, it's just poor coding. Security researchers Eric Taylor and Blake Welsh have shown Motherboard a MetroPCS website bug that, until it was fixed this month, made it easy to get sensitive info for over 10 million subscribers. All you needed was a phone number to get a person's home address, phone serial number and more. And if you weren't picky, you could have whipped up a script to harvest all of the data within two days.