Technology is usually neither good nor evil, it’s all in the application. Unfortunately the criminal element is up on 3D printing technology as well. Here’s the latest such infraction with thieves using 3D printers to make ATM card skimmers. Without giving too many suggestions, you don’t have to think long about other illegal applications from key capture and duplication to simple counterfeiting. Just like the internet brought a technological revolution, it also brought the need for new laws and security. I imagine 3D printing/scanning will be no different. Many crimes with a 3D printer will violate existing laws, but no doubt there are gaps we can count on criminal creativity to find for us to fill.