The Danger of California's 3D Printing Censorship Bill

California's A.B. 2047 mandates the installation of censorship software (censorware) on all 3D printers, and treats even circumventing it or using open-source alternatives as a misdemeanor.

The justification is countering ghost guns, but such conduct is already banned under existing law. The result reaches far beyond gun control, restricting legitimate users' control over their own equipment and their freedom to repair and modify.

The bill creates a structure that favors manufacturers. Printers must pass through a state-approved algorithm and database, and devices and software that aren't approved could effectively become unsellable. This is likely to lead to lock-in centered on large manufacturers, planned obsolescence, and a shrinking secondhand market.

Once third-party firmware and local control are blocked in particular, 3D printing turns into something like DRM. 3D printers are normally used for a wide range of legitimate purposes—movie props, prototypes, medical research, repair parts—but this bill would subject even that ordinary use to surveillance and blocking.

The author warns that once such infrastructure is built, it can easily expand beyond 3D printing into copyright censorship, control of political expression, and privacy violations. The core problem isn't guns—it's the censorship infrastructure itself, which is both technically unstable and politically dangerous.