I've had many hundreds of bear encounters over the years with only the two I previously mentioned not ending with good results. I have witnessed many more like mine that also ended in the same or similar way. The common thread in all of them is that they all happened near homes, dumps, or very well used campsites etc. I've seen more bears in the time I've been in my present home then the rest of my life. I have got to the point that I'm able to tell which ones could become problems. If the bear sees me and runs away (which is the majority) I know they are still afraid of humans. If I open the door and the bear comes towards me, I know that this could be a problem bear that's looking for an easy handout. There is no doubt in my mind that nearly all bear problems are caused by human contact and humans carelessness with food, garbage etc.
A good example is we had a neighbor (they have now moved) that looked forward to his fall cleaning of the barbecue. He always left it out and every fall a bear would open the lid and lick the lid and grill until they were spotless. People would ask him if he was not concerned about germs and he would say that the bear did the hard part and he would finish by it by putting the burners on for 10 minutes.
Last year towards Nopiming PP, a bear entered a cottage, through an open window, and went straight for the oven to give it a cleaning. While standing on the oven door it broke it, which woke the people up, before it left by the way it came.
There are starting to be more animal problems on the really busy canoe routes which are caused by careless humans and too much contact. In most cases nature does a fine job of looking after itself, but unfortunately human contact, intervention and actions are the cause of most animal problems. We are all guilty of being careless to some degree.
Here is a good story for anyone who has ever sat in an outhouse (hopefully the link works).
Perry