We already know people are really bad at picking passwords, but they're also god awful at choosing obvious, crackable credit card PINs. In fact, the most common four-digit code is not-so shockingly, 1-2-3-4. Come on, people.
Privacy guru Nick Berry crunched the numbers from previously exposed pass codes to find the 20 most popular and 20 rarest PINs. Collective facepalm! He learned that 1-2-3-4 is used more than 10 percent of the time. And it doesn't get better as the list goes on—the second most common PIN is 1-1-1-1. The third? 0-0-0-0. Honestly, as it continues, it gets even more depressing, because most of the combinations are just single digits repeated four times. God forbid you get hacked, but if you use one of these PINs, you're asking for it.
Sadly enough, Berry found that his list of most common combos can be used to guess more than a quarter of PINs out there. You can see the list above, but please, if yours is mentioned, go change it. Right now! [Data Genetics via Apartment Therapy]