People will be getting Philosophy doctorates in the future writing theses on self and the transporter.
What if they could duplicate the duplicating accidents? I'm sure there are rogue labs practicing this techno voodoo on animals and unwanted humanoids they buy from Orion slavers. They're dividing people into parts, blending the parts, making new people.. after about a ten thousand tons of TMP style screaming mush disasters someone is going to figure it out. How to blend, how to separate. How to make a profit from this technique. Quicker than cloning.