A chain is only as strong as its weakest link. Your safety depends on the next guy doing the right thing as much as you doing the right thing. As long as folks sleep with their food in their tent, hang their food poorly or leave food/snacks/trash unattended then there will be bear problems and bear boxes at shelters might help but won't solve the problem. I was car camping this summer in Canada where every campground had bear proof food boxes and trash cans. I never left food unattended and stored it properly and still had a bear come into my campsite in a crowded and noisy campground in the middle of the day. No doubt others in the past weren't so careful and that bold bear learned an easy meal could be had there.