Most individuals who would even begin to consider trying to &quot;cook up&quot; substances like nerve gas or anthrax &quot;in a garage&quot; would undoubtedly die in the process, in which case problem solved.<p>And yes, people should be able to build &quot;surface to air missile launchers&quot; in their garages. It&#x27;s called amateur rocketry, and last I checked it was quite a popular (and legal) hobby.<p>The vast majority of encryption is used in a lawful way to protect important things (information). The vast majority of firearms (in the USA at least) are used in a lawful way to protect, deter, as a hobby&#x2F;for fun, and for sport&#x2F;hunting.<p>They are very similar arguments, for a number of reasons, including the utter stupidity of attempting to make law-abiding citizens jump through even MORE hoops whilst accomplishing absolutely nothing in &quot;preventing the bad guys from making use of&quot; said technologies.