I agree with Wolfie on pretty much all points. The people who are freaking out about being able to print guns are mostly lacking the knowledge on what is readily available to the public in terms of 3D printing capabilities, and/or lacking the knowledge on how firearms work.

This reminds me a lot of the time Glocks became popular back in the 1980's. Glocks were the first mass-produced guns made with polymer frames and the media immediately went BONKERS over "plastic guns" that could get through metal detectors and all hell broke loose. This is, of course, completely ridiculous as only the grip and frame of the gun were plastic; the slide, barrel, firing mechanism and ammunition were made of steel just like every other gun. This media firestorm brought us the Undetectable Firearms Act and is the very reason why guns are required by law to contain at least 3.7oz of metal today. It was completely ridiculous then, and it's completely ridiculous now.