Eh. I don't really see how this is Darwin Award material. The girl from all accounts was as innocent in all this as the tiger was. She just wanted a fucking picture, it's not like she openly teased and taunted the tiger before it happened, ensuring that she would definitely get hurt (like the stunt show imitators, for instance, aka those who really deserve the Darwin distinction).
Yeah, posing with an animal that isn't fit for domestication or interaction with hordes of people isn't wise, since we hear about these stories all the time. But for all anyone knew, the thing was as tame as a wild primal creature can be, and the handlers were there to presumably do their jobs and make sure nothing happened. The girl had no reason to believe she was anything but safe.
The only thing I wish is that the animal had turned on its handlers, trainers, etc., instead of the girl.