Even without the magic printer, you'd probably be stepping on a number of patents by reverse engineering a Porsche (not to mention copyright/trademark infringem

Even without the magic printer, you'd probably be stepping on a number of patents by reverse engineering a Porsche (not to mention copyright/trademark infringement for things like the emblem). You could still be found to be infringing upon patents if you were only using the duplicates for personal use (IANAL, though). As far as the length of copyright (which, I agree, is currently too long), you can thank Disney for that.