Shares are different: they're like money, they represent value. A copy is a copy. Humans copy: that's how we made technological progress. Someone didn't invent agriculture while out on a hunt and then coast for the rest of his/her natural life on the "intellectual property" and then have his/her descendants coast on the proceeds. People copied what they saw that worked. Copying is how humans make progress, trying to stop or inhibit that is going to warp society beyond belief.