I think to the best of my knowledge that in teleporatation when one grabs the quantum information from the original location one destroys the physical content from the original location, then transmits the information to the second location, and rebuilds the original physical content. In other words the original physical content is destroyed in the act of analyzing the content. So there is not a danger of leaving a "copy of oneself" at the original location. Necessarily to measure quantum spin and so on, the original physical material is destroyed, or more precisely, is re-arranged into indecipherable form.