Smith believed in his guardian angel and retribution and punishment would be meted out against those who oppose him. Angelic visitations, whether in dreams or in reality, is formally taught in Mormonism: "I have given the heavenly hosts and mine angels charge concerning you . . . I will be on your right hand and on your left, and my Spirit shall be in your hearts, and mine angels round about you, to bear you up." (D&C 84) So, we need not be surprised to learn that Smith had a guardian angel at his side at all times, night and day. Joseph's telling of a dream about his enemies being devoured by beasts was a scare tactic in warning others not to oppose him and a means to maintain control of his ministry. It was all about spreading fear! Needless to say, however, the dream was bizarre and provides a direct look into the subconscious mind of the prophet. Fascinating!
I do not believe any ordinary person would have related such a dream publicly unless their main motivation was to spread fear and maintain power over others. But Joseph Smith was no ordinary person!