I think gallows humor makes sense sometimes. For example, in the case of terrorism, which we really have no way to prevent and can just as easily hit the rich as it can the poor. Hence, the jokes that we hear nightly about Osama, etc.

But the people who buy these shirts or make these games probably won't have to deal with swine flu (or at least die from it), because they likely have good healthcare and their nations are relatively rich with infrastructures that can accommodate a large percentage of their populations becoming sick at once. I don't think they're in a position to mock the disease.

On the other hand, I'm fine the Mexicans who are sprucing up their face masks with funny mustaches as people are dying around them. They're living it. The guys looking to get their startup a few more ad impressions? Not so much.