I consider this poor management much in the matter of allowing artificially managed wolf packs to prey on trapped Yellowstone bison and calling it “natural”. I concur wholeheartedly...
Here in the south we use the S-S-S methodology....
Shoot...
Shovel...
Shutup...
The bison in Yellowstone are exceptionally calm beasts. They don't spook easily with all the people and vehicles in the area. I opened my cabin door at Old Faithful to see a 2000 lb bison standing just outside. It did spook him just a little to have the door opened, but he calmed down pretty quickly.
The bison are so tame that they are likely easy marks for wolves and bears. I see bison skeletons and fur all over the grounds around Old Faithful and Black San Basin. I've seen a grizzly wandering through the area on our April 20th visit this year.