White cockatoos are the douchebags of the Australian avian community. The chewing thing I can understand at least, it's not malicious behaviour as they probably need to stop their beaks from growing too long to eat with, and then starving to death. But it is annoying when they chew on timber siding, balconies, verandahs..... I've even had them cut a shade sail down.
Watching them interact with other birds is where their douchebag nature really shines. They're quick to display aggressive signals with other species when eating food. We have chickens, and the cockatoos will try to threaten them, even though the chickens are several times larger by mass. They're just rude as well, they will swipe half the food out of the dishes onto the ground, then flip the dish over.
They also love to hang around in large flocks right next to roads, so they are often hit by cars. I rescued a stunned one off the road once and took it to a vet. Getting a full earblast from a cockatoo while inside a car with one is a bit of a shock.
Which brings me to their sound. What kind of just god would make this abomination?
You can imagine 50 of these things in a flock first thing in the morning outside your window.
By the way, compare it to a black cockatoo sound: