This is an interesting subject that constantly finds new adherents. Another group (other than Mormons) who may have planted Hebrew artifacts are Seventh Day Adventists. I remember reading the senior thesis of a Harvard archeologist who studied Hebrew inscriptions (and other evidence) in New Mexico hoping to find evidence of the so-called crypto-Jews (she was Jewish).
She found that what was thought to be evidence of Jews had actually been planted by a group of Seventh Day Adventists from Mexico City who had moved to New Mexico in the 1930’s.