I think you will find the following discussion of managing bear-human interactions, and the need to keep bears away from human foods helpful:  https://www.nps.gov/subjects/bears/storingfood.htm

 

In many naturally managed areas with significant visitation, keeping the wild populations away from human food sources can be a tricky problem.  I am personally acquainted with the island fox (a smaller version of its mainland ancestor) and the campgrounds at Channel islands National Park    Here the NPS has installed fox proof metal storage lockers at each campground site to keep the foxes on their natural feed.

That isn't the only natural population which poses potential interactions with humans with potential negative consequences.  There is a substantial shark population in park waters, due to extensive pinniped   populations.  It is a good idea to avoid feeding them, as well.....

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