For everyone saying that people are so used to clicking yes on dialog boxes without reading them: Then change that paradigm for different levels of importance.

For everyone saying that people are so used to clicking yes on dialog boxes without reading them: Then change that paradigm for different levels of importance. For example, for a test alert, use an automatic countdown that will activate the alert unless canceled within N seconds. The ramifications of a test alert going out accidentally are a lot lower than a real alert going out accidentally. For more serious alerts like this most recent ballistic missile one, turn the entire screen red, have “THIS IS NOT A TEST” header, with an explicit acceptance required to send the alert. Two people may mitigate this existing problem but it still doesn’t get to the root of the issue. Same thing with your hammer analogy. Everything shouldn’t look like a nail then! A real alert should look like a nail. A real ballistic missile alert should look like a railroad spike (aka really big nail). Test alerts should look like a screw. Etc.