Code always has flaws, and those flaws are easy for bad guys to find. But if your computer has deliberately been designed with a blind spot, the bad guys will use it to evade detection by you and your antivirus software. That’s why a 3-D printer with anti-gun-printing code isn’t a 3-D printer that won’t print guns—the bad guys will quickly find a way around that. It’s a 3-D printer that is vulnerable to hacking by malware creeps who can use your printer’s “security” against you: from bricking your printer to screwing up your prints to introducing subtle structural flaws to simply hijacking the operating system and using it to stage attacks on your whole network.
This amounts to a criminal sanction for telling people about vulnerabilities in their own computers. And because today your computer lives in your pocket and has a camera and a microphone and knows all the places you go; and because tomorrow that speeding car/computer probably won’t even sport a handbrake, let alone a steering wheel—the need to know about any mode that could be exploited by malicious hackers will only get more urgent. There can be no “lawful interception” capacity for a self-driving car, allowing police to order it to pull over, that wouldn’t also let a carjacker compromise your car and drive it to a convenient place to rob, rape, and/or kill you.