Bears, however are fairly intelligent creatures and are capable of learning, then teaching their offspring what they have learned. So bear protocol is an ever evolving strategy.
I think the general consensus is that bears are roughly as intelligent as a 12-year old. And we know what kind of havoc they can wreak.
Funniest bear story I ever read was of a polar bear that had taken up residence in a city dump in northern Alaska.
One day it wandered about and found a man's cabin. He had an outdoor freezer that he kept full of meat and padlocked. One day he comes home, and the freezer is out in the yard, all beat up with big, huge dents in it, but unopened.
Next day he comes home, and the freezer is back out in the yard, opened. There was a steel pipe next to it that had apparently been used to pry open the lock. He owned no such piece of steel. There was found around the area bear poop with styrofoam and plastic in it. Apparently, the bear figured out how to get the lock off, and procured for itself from the dump the prybar of proper length and diameter to get the job done.
They called in a ranger to trap and relocate it. The ranger was given some pictures taken and shown around the dump where the bear had been living. The pictures showed a big black stain on the front of the bear, and the ranger was shown several 55 gal drums of waste motor oil the bear had apparently been drinking (I guess it was close enough to seal blubber for the bear). The ranger tracked it around, the bear leading him in circles. He finally gave up for the night and went to his cabin to sleep.
In the morning, he came out to see bear tracks all around, and two of the tires torn off his SUV and partially devoured.
That's one bear you just let have its way. As of the writing of the article, the bear had not been caught.