The Darwin Awards are a classic example of black humor. These poor people died doing incredibly stupid things and we laugh...or at least I do.
Frankly, if any of my relatives or close friends died doing something incredibly stupid, I would mourn AND laugh.
Humor is eveywhere. Not everyone sees it. And it is not always appropriate.
If someone falls down on the street, I laugh. I can't help it. It is childish and maybe mean certainly not appropriate but there you go...

I can't look at a Hefty Bag without laughing out loud - that joke was on me. And mean, Jacqui. LOL