The most important point is missing - you can't stop the signal. Even if you somehow make the blueprints illegal, they will simply show up on torrent websites,

The most important point is missing - you can't stop the signal. Even if you somehow make the blueprints illegal, they will simply show up on torrent websites, darknet, etc. The cat is out of the bag. The second most important point that's missing is the effect on the countries where guns are illegal and/or tightly controlled. They will be affected much more.