The sad part of this story
It's not the bears. It's the people who have fed these bears, either directly, or by not storing food and garbage effectively. And now the bears face removal and/or euthanasia. Yosemite and other national parks finally insisted on bear canisters in the back country when they found that not only a large percentage of hikers were not trying to hand their food correctly---even those that thought they were doing it right were still making lots of mistakes. More than 90% of all the food in the backcountry was available to bears until the switch to bear cans.
We certainly use ours.