Their eavesdropping apparatus (which is small enough to fit in a suitcase) was designed totakeadvantageof a weakness in a particular sort of photon detector in Bob's receiving equipment.
Investors can takeadvantageof this through using GTC (Good Until Canceled) Limit Orders to buy weaknessto a value level, and to sell strength to a risky level.
If you cannot sell your product without relying on consumer weakness, without running experiments to test which behavioral failures you can takeadvantageof, maybe you should be selling another product.
Al Qaeda has largely taken advantageof the chaos that ensued after the revolution and the weaknessof national-security forces totake over large towns and even small cities in Yemen's south.