I think that the more effective message is "if these bears become too habituated to humans and human food, they become a threat to humans and are therefore killed"

They should also list how many bears have to be killed in the Sierras every year because they become a threat to humans due to food being too easy to acquire.

I wonder if that woman would have laid on the horn a little sooner if she knew that letting him have the food so easily could mean a death sentence for the bear.