You know, you see all these shows on PBS about wildlife and they tell what the animals do and don't do. Well I and people I know can tell you it's a lot of XXXXXXXX.
First of all the pipeline does not stress the Caribou. In fact they will line up for miles to lye in the only shade on the North Slope. Under the pipeline.
Bears will hunt and eat people. A few years back a fellow was deer hunting near Juneau. This fellow was using a deer bleat to try and call in a deer. A brown Bear slipped up behind him, attacked and killed, then ate the fellow. Another incidense an Air Force officer took his wife out to a cabin for a reconcillation period (they had been having marital problems). According to the Trooper report she was killed and eaten by a bear. Everyone involved thinks he killed her, but there is no way to prove it since bears did eat the evidence.
You read lots of stories about people getting attacked by Grizzlies. Since they survived they or someone writes their story. They tell how they were attacked then the bear left, if they had not slipped out then, no doubt the bear would have returned when he got hungry. No one is left to tell or write the stories of the non survivers. The only people that hear about those are the family and friends, and the locals where the attack took place.
I dumped my motorcycle a few weeks back. I scraped my arm and was bleeding. Since I take blood thinners, the little scrape was really bleeding, so I left a blood trail back to the truck. I had left the first aid kit in the truck. While I was patching up my arm, I saw a Black Bear following the blood trail. Since it was a small bear I did not want to shoot it, even though Black Bear is open all year. I left the bloody towel and cotton balls on the rock where I had sat to fix the arm, got into the truck and drove away. I drove up the trail and stopped where I could see the spot. The bear finally got to the spot, searched all around, then ate the bloody towel and cotton balls. After that he searched around a little more then left. If I had been really hurt, or knocked out, the outcome would have been very differant.