I agree with Kevin. We are leaving too much food laying around. On several hikes where I spent time with "thru hikers" I observed food in tents, shelters and trash laying around. When I confronted them about the problem they acted as if I was crazy. At Tray Mountain I watched a mouse run in an out of a pack. When I asked the owner what was in it he listed off the contents. His tooth brush was in it instead of on the bear cable. While I'm not sure a bear would have come looking for a toothbrush I have always hung all "smellables".
Recently while camping with a group of Boy Scouts just north of the NOC we had a couple of bears wander into our camp. I slept through the visit but my tent mate said they walked up the trail, looked around and then left. All food, first aid kits and anything else with a smell was hung 12 feet above the ground.
Most of the bear attacks I have heard about in this area always involve people wanting their picture with a bear and luring the bear with food. They are wild animals not your dog. Even your dog will go through the trash if you leave it accessible.
I really enjoy hiking the mountains here and meeting other hikers but I am always amazed at how unprepared some are for the wilderness. I am always disappointed at the trash other hikers leave behind. Burning trash is not an acceptable method of disposal. If you bring it with you store it properly and pack it back out!
I was just reading an article about cooking in tents. I don't know how the rest of feel about this but can you think of a better way to attract bears than to cook/eat where you sleep? Even the clothes you cook in will hold the odors of your food. Its like calling "Come eat me Mr. Bear". The best procedure is to cook and eat prior to arriving at your destination for the evening or at the very least do it down wind of your sleeping area. That way any bears that smell supper are not nosing around your shelter.
It may sound like over-kill but animals especially bears have a keen sense of smell. I have heard they can smell an open tuna pouch over a mile away. Even things we can't smell will attact them.
The best defense from bear attack is to keep a clean camp site and store smellables out of reach.