Why would one do that, there is no law agaist making a boat, it is criminal to make a nuclear device.
Thus your argument is not only a Straw man but a moronic one at that.
>>>In fact I would expect to be thrown into jail without even seeing court.
Really? Then I feel sorry for the world you want to exist in. Even if you did build said nuke, I would expect you to get Due Process, but charged under the criminal laws of the land, and be held to account by a Jury of your peers
To believe the government should have the authority to throw you in jail with out trail is extremely dangerous.
Regarding the court it's definitely not expressing my opinion, more like extra spices on the rant :) In case that wasn't obvious.
Apart from that there is a lot not criminal, but highly suspect:
+ 200W laser: https://www.youtube.com/watch?v=IzUoe-9bKa0 + machine gun on quad: https://www.youtube.com/watch?v=SNPJMk2fgJU
But even under current laws, if you make a new drug the government must go through a process to make it regulated and classify it. It is not automatically illegal.
By default all things are LEGAL until they are made ILLEGAL, not the other way around. The one exception to this is Medication, where in order to claim it treats as specific illness it must be approved by the FDA to treat that illness, the drug itself if not illegal per say, it just can not be proscribed by a doctor to treat X until it is approved to do so.
Further even in the regulations of Dangerous drugs they do not prevent someone from finding a market in other nations for them. There are a whole host of medications that have been not been approved by the FDA that are sold in other nations.
EDIT: If its only dangerous.
Second, what makes drawings suddenly less worthy of compensation than a single prototype? Don't they have value?
Third, it's not like the rules suddenly changed here. He knew the rules going in, and he built something he couldn't sell. That's a failure to find a market. Your idea opens up a scam of building impractical, yet dangerous weapons for government compensation.
Danegeld.
But the secrecy order is a separate matter.