I think it's funny too. After all, it's not banned. (Yet?)
In a totalitarian society (and maybe some other forums), this type of post could possibly result in awful consequences for KoRn. But the poster #8 who gave the explanation about Tourist Guy is right. We all made it through 9-11, we still shrink from the memory, we saw Tourist Guy pop up everywhere, and most of us laughed a little with all the variety of attempts to surprise with ingenuity.
Disaster for others at distant parts of the globe is no different; it's still disaster. We feel the horror of the tsunami too, and we decide what to do, or do nothing.
But we also know through experience that some silliness in face of disaster helps reconcile our feelings and our own survival, which ultimately faces mortality, in the end.