The koala thing is interesting. There is definitely an element of being able to say, "look what I did to help!"
At the start of January, a long-standing Australian group put out a call for items to be made (pouches, sleeping bags, nests) for animals displaced by the bushfires. Immediately people sprang into action around the world, some coordinated, some not.
The Australian group asked people to stop making and sending things, as they were inundated, and suggested donating money instead. They were largely ignored. Lots of messages like "if they don't need it now, they'll need it soon!"
Now, some international groups coordinated with airlines or people already flying to Oz to take things in their luggage. Fine. Others sent things individually, which is ludicrously expensive. An example was given of an American who sent something that wasn't even on the wish list, at a postage cost of over USD200...200 dollars which could have been donated to a charity giving the animals food, medicines, and so on.
The Aussie group thanked everybody then politely begged them to stop, yet again calling for monetary donations instead. Some people went crazy, calling them ungrateful, and insisted that they were not going to stop making things for the animals.
In the end, the Aussie group started sharing patterns for toys etc that could be sold to raise money, and people seem to have calmed down a bit.