Joseph Smith - History 1

The Prophet Joseph Smith later recalls -

"Some few days after I had this vision, I happened to be in company with one of the Methodist preachers, who was very active in the before mentioned religious excitement; and, conversing with him on the subject of religion, I took occasion to give him an account of the vision which I had had. I was greatly surprised at his behavior; he treated my communication not only lightly, but with great contempt, saying it was all of the devil, that there were no such things as visions or revelations in these days; that all such things had ceased with the apostles, and that there would never be any more of them.
22 I soon found, however, that my telling the story had excited a great deal of prejudice against me among professors of religion, and was the cause of great persecution, which continued to increase; and though I was an obscure boy, only between fourteen and fifteen years of age, and my circumstances in life such as to make a boy of no consequence in the world, yet men of high standing would take notice sufficient to excite the public mind against me, and create a bitter persecution; and this was common among all the sects—all united to persecute me.
23 It caused me serious reflection then, and often has since, how very strange it was that an obscure boy, of a little over fourteen years of age, and one, too, who was doomed to the necessity of obtaining a scanty maintenance by his daily labor, should be thought a character of sufficient importance to attract the attention of the great ones of the most popular sects of the day, and in a manner to create in them a spirit of the most bitter persecution and reviling. But strange or not, so it was, and it was often the cause of great sorrow to myself."  (Joseph Smith—History 1:21–23)

Even though there is know question that this was a miraculous vision, it is understandable why the Prophet did not seem to make a big deal about later on.  Obviously the persecution he receive was not forgotten.