Someone mentioned 3D printers in another post and got downvoted for it. But think about it.

You invested a lot of time into creating an object everybody likes. People can get it in a online shop and it will be send to there address.

Now a clever guy scans the object with a 3D scanner and is putting the model online. Everybody can now downloading the model on The Pirate Bay and print it at home. And they all say: "fuck that online store, it is way too much hassle and costs too much".

It's a difficult discussion. Therefore I think it's way to easy to just call making a copy not stealing.

Edit: the post by randomdata: http://news.ycombinator.com/item?id=3479581