A quick search suggests that 3D-printed guns being used in crime is an actual, for-real, and growing problem.
I take it that you wouldn't be OK with somebody building a uranium enrichment facility in their backyard for their hobby reactor. So there is a line to be drawn on where people's freedom to tinker ends; it's just a question of where you draw it.
Personally, I think given there is an actual documented, non-isolated problem with 3D printed guns being used for violent crime, there's a debate to be had that's more sophisticated than "REGULATION BAD".
I take it that you wouldn't be OK with somebody building a uranium enrichment facility in their backyard for their hobby reactor. So there is a line to be drawn on where people's freedom to tinker ends; it's just a question of where you draw it.
Personally, I think given there is an actual documented, non-isolated problem with 3D printed guns being used for violent crime, there's a debate to be had that's more sophisticated than "REGULATION BAD".