April 14, 2026
Printer says “NO,” internet says “LOL”
California ghost-gun bill wants 3D printers to play cop, EFF says
‘Spy printers’? Internet roasts plan as EFF warns of lockouts and snooping
TLDR: California’s AB 2047 would make 3D printers block gun parts using a state-approved filter; the EFF says it’s unworkable and dangerous for privacy and open‑source. Comments roast the idea as “spy printers,” crack jokes about currency detectors and dyed bullets, and argue over safety versus surveillance.
California wants 3D printers to play hall monitor for “ghost guns,” and the internet is losing it. AB 2047 would force printer makers to install a state-approved filter that scans designs and blocks anything gun-like. The Electronic Frontier Foundation (EFF) says that’s a privacy nightmare and a tech fantasy rolled into one, warning it could shove open-source tools into the graveyard and turn printers into tattletales. Their blog posts lay it out: flimsy detectors, easy workarounds, and a slippery slope to blocking far more than weapons—think “no Pikachu toys” and “no tractor parts” vibes. Read their case here and the debate thread here.
Commenters are split between “this won’t work” and “this will watch everything.” One user deadpans that if you can make a gun, you can make the bullets too—edgy, but it captures the mood that determined tinkerers won’t be stopped. Another jokes about testing how small a piece of U.S. currency a printer would flag, adding “and definitely not on Wi‑Fi,” turning surveillance fears into a meme. The funniest riff? A “red diesel for bullets” gag—imagining tax-dyed ammo for the shooting range.
There’s drama, too: some roll their eyes at California panic, saying bans just push people to ignore the rules. Others argue the intent—cutting untraceable weapons in a country drowning in gun violence—deserves a try. But overall, the commentariat’s verdict is loud and messy: they don’t want ‘copware’ in their makerspace, and they don’t trust a blacklist that can grow forever.
Key Points
- •California’s AB 2047 would require 3D printer manufacturers to implement state-certified algorithms that detect and block firearm-related designs.
- •EFF argues the proposal is technically infeasible and would push manufacturers toward restrictive, proprietary software ecosystems, sidelining open source tools.
- •The bill would require vendors to verify printers on a state allow-list and could criminalize users who bypass scanning or install alternative software.
- •EFF warns detection could be easily evaded by small model or G-code changes and may generate false positives, hindering legitimate use.
- •EFF cautions the approach could expand to other content enforcement (e.g., copyright or patented parts) and enable broader surveillance of printing activity; similar proposals exist in New York and Washington.