There seem to be a couple of different scenerios here.
1. The fellows who live in the country. I agree completely with the shoot, shovel and shut up philosophy. Protection of family and human life is paramount. I have kids too, and I would not hesitate to shoot a predator if it came into the yard or near the house.
2. The other is when in the bush while hunting. In this scenerio, I think a little more thought is required. I certainly wouldn't hesitate to defend myself, but the animal would definately have to pose a threat. I have seen large black bears, one time in particular, quite close. I did not shoot it, however, as it took off running in the other direction. It is amazing how close two creatures, myself and a bear, can get to one another in dense bush without seeing one another (about 30 feet). I did manage to see it first and was ready to fire if it made any move towrds me, but when it saw me, it took off at full speed away from me.