Drilling for tornados

We had two, count 'em TWO, tornado drills at work today. I'm mostly fine with that, but they had one at around 12:30, and the other at 5:20, both periods of reduced population in my building. Seems like those are the worst times to have such drills. Plus, people coming in from lunch would go straight upstairs, not realizing there was even a drill. How is that helpful?