We generally take certain principals for granted. The more water you drink, for example, the healthier you'll be. The more time you spend reading car news on Autoblog, the better informed you'll be. And the more airbags your car has, the safer you'll be. Because airbags equal safety. But that's not what some unfortunate drivers of vehicles equipped with Takata airbags are finding, and tragically finding out the hard way.