God has appeared to individuals at various times in the Bible without tons of public observers. God also appears in the Book of Mormon at times to many people, thus there are many witnesses. Your argument doesn't make much sense to me.
In any event, it's Mormons and not Mormans. It's Joseph Smith and not Joe Smith. I don't care if you disagree with my religion, but at least show it some modicum of respect. I don't think that's too much to ask for.