Selfie-taking South Koreans have one-upped the rest of the world with the rapid popularity of "selfie-sticks," or low-tech solutions to improving self-portraits taken with our high-tech phones while in public. But now the country is getting ready to crack down on the tools, even making them illegal. For becoming public nuisances? For being used as weapons? No, it's simply because they're unregistered Bluetooth devices.