You know, after the fact, I agree. It's probably law, though. Meant to deal mostly with dogs. If my neighbor's pit bull mauled the mail lady, I'd want it put down too. The idiots putting that poor girl in that situation are the ones to blame on this one, though.
On the other hand, if the tiger had to be restrained while she had photos taken, I really would have hoped *someone* would have had some type of portable cannon available while they had it out playing amongst the humans.