Lol, it's a bit crazy huh?
In the tropical north it's so easy to get it wrong, simply standing next to a creak, river it billabong (water hole), or at the shoreline of the ocean is dangerous as crocs lurk there. So, it's smart to give the litte kids an appreciation of the animals themselves and the dangers. The saltwater crocodile is a calculating (and brutally efficient) hunter, that's why they have remained virtually unchanged since prehistoric times, a perfect design already, and so being aware is one's only chance.