Most people fail putting an Ikea cabinet together. You cannot compare a simple print job with custom construction (even a zip gun is beyond the skills or availa

Most people fail putting an Ikea cabinet together. You cannot compare a simple print job with custom construction (even a zip gun is beyond the skills or available tools of many people). 3D printers are currently rare and expensive, however they are bound to become mainstream and inexpensive very quickly. When every angsty teenager has the capability to print a gun simply by hitting "print" with the $69 3D printer in the corner, there is a legitimate concern, and many of the haughty, world-weary replies to this submission declaring this a non-issue and nothing new are not reasonable. How will the world adapt? We'll see. I fully expect consumer 3D printers to be legally required to identify gun-capable parts and reject to print them, or intentionally print flaws (in the same way that your printer will watermark printed currency, and your scanner will corrupt scans of currency). There will likely be restrictions on the strength of the materials, etc.