Wait...didn't one of Smith's horde have a "revelation" that this wasn't OK anymore?
These people have been excommunicated by the Church of Jesus Christ of Latter Day Saints, so technically not part of the church. However, they get their doctrine and practices from the writings and scripture of the LDS namely the "Book of Mormon", "Doctrine and Covenants" and "Pearl of Great Price." They also will claim priesthood authority through the lineage of the Mormons.
(sitting back quietly now, waiting for the denial from the FReep Mormons......)