

That knowledge is nowhere near as restricted as you think. People regularly build small thermonuclear reactors in their basements for shits and giggles. It’s not exactly cutting edge technology.
Similarly, anyone with slightly more than a passing interest in model rockets knows someone who’s been visited by the ATF, as your average solid fuel model rocket engine is basically a pipe bomb with one of the endcaps taken off.

I don’t much like hypotheses that require certain size groups of people.
But I guess that’s just the instability of the dictator applied to the entire world.