Are Mormons Mormons?

Let's set aside the question of whether or not Mormons are Christians, considering the question is ridiculous from the perspective of the Mormon and anti-Christ from the Christian's perspective. The question posed here is whether or not a Mormon is a Mormon. Perhaps we should first identify what a Mormon is. According to good ol' Merriam-Webster, a Mormon (by way of defining a Latter-Day Saint) is a "member of any of several religious bodies tracing their origin to Joseph Smith in 1830 and accepting the Book of Mormon as divine revelation." Going through a bit of an exercise in logic, if a Mormon accepts the Book of Mormon as divine revelation, he must accept Joseph Smith as a true Prophet of God. If he is a Prophet of God, he had some pretty reliable information. If he had reliable information, that information should be used as a foundation or information filter through which new information should be passed. Should that filtered information not pass through the filter, it's garbage and should not be countenanced. I.e. if the new information controverts the information he supplied us with, that new information is garbage. If we accept that new information, we admit that Joseph Smith didn't know what he was talking about. This, of course, obviates the whole "divine revelation" idea. So no more reason to believe the Book of Mormon. "But we believe in modern day revelation!" Excellent! You should! Information doesn't stop coming down the pipe. But the belief is in "modern day revelation," not in "modern day revelation, no matter what it controverts or distorts." Or am I wrong here?

With only the slightest paraphrasing, I've heard the following: "Thank God for modern day revelation because it makes the scriptures and some of the questions they raise less pressing."  This is disturbing at the deepest levels of what makes a spiritual, even religious person tick.  It purposely and purposefully denigrates or ignores the traditions and teachings of prophets much further back than just Joseph Smith.

Perhaps we shouldn't be so quick to dismiss the old and original in favor of the shiny and new.  And we most certainly should n't dismiss foundational principles and teachings in favor of the convenient and expedient.

Search within yourself.  If you accept and embrace the newest teachings because they make you feel good without making you feel good because they fit nicely within foundational principles, perhaps not only the teachings are wrong, but so too is the recipient of the new teachings.