If you happen to drive through Yellowstone National Park at any point in your life, you need to know there is a certain lane designated to you by the bison. For them, it's the middle of the road. For you, it's the shoulder as one recent driver through the park found out.
If you visit Yellowstone National Park now, you'll find feeding bears solidly in the "don't" column. But, there was an era many years ago when people were not only allowed to feed bears in Yellowstone, the practice was sort of encouraged.