This is going to be a very difficult problem to solve, but we should still figure it out. You can’t police distribution of a CAD file in a free society. Most 3D printers can currently only print plastic, but there are more advanced printers producing functional guns.https://twitter.com/MassAGO/status/1023996974528454659 …
The future world will have rapidly increasing capability of ordinary people to make instruments of death and destruction. The ONLY viable solution is fixing the causes that make people want to do so before it's too late.