We can't forget the infamous dingo. While not commonly considered dangerous to humans, there is the unsolved case of Azaria Chamberlain — as in, "A Dingo Ate My Baby." Yes: a true story. Not just a Seinfeld episode. Whether or not a dingo ate the baby was never resolved.
It's also said that they like to take iPods.
Australia, you mad menagerie, thanks for the fun.