I won't be at all surprised if we eventually do see a report of a death as a result of someone venturing somewhere stupid to 'catch' a Pokemon.
We're getting close now to this. There's been reports of robbings, beatings, people being hit by cars. There's also reports of drivers playing the game and racing to the next Pokémon. I saw a vid where a guy walked off a pier into a harbor. They fished him out and it turned out there was another guy already in the water from doing the same thing. Sorry... no sympathy here for those Darwin candidates.