@cstross : in one of my books, a short story is about a lonely engineer setting up, alone, multiple terrorists attacks to make the point that current security theater is making the world more dangerous.
The story is set in a realistic tone, with everything doable by a lonely engineer with of-the-shelves material.
Most of the reactions I had were: "You are crazy! What if you give the idea to true terrorists?"
Bruce Schneier said: our luck is that people wanting to kill other are extremely rare