Please elaborate as to how that would be worse. At least half these nutters wouldn't be able to figure out how to use a printer, let alone a 3d printer.
This thread has, predictably, devolved into a hugely disrespectful exchange given the linked post.
But as an aside, I shudder to think of trying to design an additively manufactured part that would reliably contain a propellant blast using anything less than an industrial $100k-$1m DMLS or at least really really good SLS machine. If the goal is to harm somebody using a 3D printer, you'd probably be better off bashing them over the head with it.
Full plastic guns generally don't last very long- but they have been proven to somewhat work since 2013. Now there are more stable designs that use off-the-shelf plumbing parts with plastic components. There are also designs that can be CNC'd with a cheap machine
Why does everyone thing 3D printing is magic? You're not going to be 3D printing weapons that can kill scores of poeple. Any firearm printed on an FDM printer is lucky to fire once without injuring the dipshit wielder.
This comment betrays a lack of understanding around 3d printed firearms.
Of course there are your (nearly) fully plastic single shots like the Harlot that fire small calibers and dont always last long.
On the other hand, there's plastic lowers (the only part considered a firearm and thus the onlynpart that needs to be bought through an FFL) for AR15s that use off the shelf plumbing supplies for the pressure bearing components.
The files are readily available and able to be printed on low end FDM printers with little adjustment and troubleshooting completely bypassing the need to purchase a firearm from a dealer.