They worry with good cause. We worry about bugs where I work, and they still make it through somehow. Worrying about them doesn't prevent them. See also, Knigh

They worry with good cause. We worry about bugs where I work, and they still make it through somehow. Worrying about them doesn't prevent them. See also, Knight Capital: https://dealbook.nytimes.com/2012/08/02/knight-capital-says-trading-mishap-cost-it-440-million/ https://dealbook.nytimes.com/2012/08/02/knight-capital-says-... , where a bug cost it $440 million. It's already been seen on a small scale.