Every now and then, we hear about some event in the news. Sometimes it can cause unjustified panic, like when people in the U.S. started panicking about Ebola virus, despite the risk to the average American being next to nothing. Other times, it can cause realistic concern, such as we see among the people of Flint, Michigan, or among members of communities where there are disease outbreaks. Reactions to these events run the gamut from the rational to the irrational and absurd. There is always...