It's wrong to profit from the misfortune of others. I ask my students whether they'd support a law against doing so. But I caution them with some examples. An orthopedist profits from your misfortune of having broken your leg skiing. When there's news of a pending ice storm, I doubt whether it saddens the hearts of those in the collision repair business. I also tell my students that I profit from their misfortune — their ignorance of economic theory.

Economics for the Citizen