The tourons have already been spotted at Yellowstone this season, so it's no surprise that the National Park Service felt the need to school the masses again.
A couple was recently filmed appearing to be running from a large bison herd. What comes to question though, is why were they actually running "with" the massive animals?
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.