It's not often you get such big headlines highlighting why good design is important. You might not realise until you start paying the price of an inexperienced designer who doesn't have good practice and user experience at the forefront of their designs!
How do false alerts happen? As soon as I read about the false alert of a missile attack on Hawaii I knew who would be blamed: some poor, innocent person. Human error, would be the explanation. But it would be wrong. The real culprit is poor design: poor, bad, incompetent.