P. ALLEN - I know that when I go to church I see the crucifix, I think of how Christ died for our sins, not simply that he died. If he wouldn't have died our religion would not be, he wouldn't have been resurected. This is the universal sign of christianity. Is it forbidden for Mormons to were a cross? Where does it say anywhere in the Book of Mormon that the cross should not be used as a sign of Christ.?

JOEL - What you say about the crucifix makes complete sense. The LDS church believes the same thing. In fact some of our own Book of Mormon and Doctrine and Covenants scriptures admonish disciples of Jesus to "take up their cross", yielding themselves in humility to their Heavenly Father. We just simply do not choose to use a physical representation of the cross as a reminder of what Jesus did for us. We are reminded of it every Sunday in church when we partake of the Sacrament. We remind ourselves every day of it when we pray and read the scriptures. Also, there are so many other things that Christ did for us, we believe that no one symbol is sufficient to convey all this. The cross, with its focus on the death of Christ, does not symbolize the message of a living, risen, exalted Lord who changes the lives of his followers. This is why President Gordon B. Hinckley has stated that the lives of people must become a "meaningful expression of our faith and, in fact, therefore, the symbol of our worship".
Also, the cross is used as a symbol of the "traditional" Christian community. Although the LDS church condisers itself to be Christian, it does not want to be associated with "traditional" Christianity because of how different some of the core beliefs are. People say that the LDS Church is changing to try and fit in with mainstream Christianity by talking more about Christ, but this not true. God the Father and Christ have always been the center of our worship. Lately, we are just trying to let the world know this so they will understand why we believe we are a Christian religion, although not associated with "traditional" Christianity.
It is not forbidden for a member of the LDS church to wear a cross. We have all been taught what I have stated above and therefore most of us choose to not wear one.
The Book of Mormon does not say anywhere that the cross should not be used as a sign. The people in the Book of Mormon did not use the cross as a symbol at all except for the figurative expression, "take up your cross"(3 Nephi 12:30) as I mentioned earlier. The physical sign of the cross was also not used at all in the early church(New Testament) after Christ died. In fact, it was not used as a Christian symbol until sometime during the 4th or 5th century. See here
Does that mean for the first 400 years after Christ, people who called themselves Christians were not really Christians?