Will wild bears attack you if they see you?
After multiple trips to Jasper and Banff, I've lost count of the number of wild animals I've seen (including many bears), and I have never been attacked by one of them.
But then, I don't carry food, I don't tease them, I don't try to invade their personal space, and I stay far away from their young.
Wild bears, like most wild animals, are actually wary of humans. They will attack if they feel threatened by you, and if you have food and they are hungry they will probably want to get their paws on it (and you will likely be injured when they push you out of their way). And if a mother bear thinks you are a threat to her cub, watch out.
But they won't just attack on sight. As a rule, if you leave them alone, they will leave you alone. Otherwise, I never could have gotten this close to one: