While I don't doubt any of you who have experienced encounters with grizz and black bears in the woods, nor do I question your stories. The article I posted to me seemed very out of the ordinary behaviour-wise for a black bear, especially in Ontario where I used to live.
But I can only speak from my experience of 20 years hunting, fishing and camping in cottage country Ontario (around Orillia, Bracebridge, Gravenhurst, Port Severn, Big Chute, Huntsville, Minden etc). I have sat in treestands with bows and arrows (no guns) for hours upon end, at times with bears just 20 to 30 yards away, noshing peacefully on the stale donut/mollases bait barrel. Never once was I challenged by one. The only curious encounter was when a very large female with a cub in tow walked toward me in my treestand from the barrel, stopped and looked up at me (oh yes, I was exuding plenty of "fear-imones" in my sweat). But she just turned and went back to finish dinner.
I've walked up on bears while fishing, hiking, scouting for deer and even when grouse and showshoe hare hunting, where the experience was ususally you hear this incredible crashing of brush, snapping branches and breaking sticks only to realize the bear that was very near you was now in high speed escape mode and no threat at all.
Thankfully, all the bears I bumped into ended up in the stew pot, ran like heck or left me well alone. But we always hear of the stories in the media of those who got attacked. I bet the percentage of attacks to actual human bear encounters is miniscule. IMHO, this poor dude who got his calf gnawed off is for sure the very rare exception.
God never did make a more calm, quiet, innocent recreation than angling - Izaak Walton