^^^ I am with NikeX on this one. There are risks of things going horribly wrong even with all the safeguards Stuxnet & Flame have, but it is still much better than going in all guns blazing IMHO. Stuxnet & Flame are incredibly selective & smart and will do absolutely no harm to computers not belonging to the target.
Until some college kid saves a copy, learns how to take control of it and posts instructions on some hacker forum.
Cyber warfare is unlike any previous forms because while only some nation states and the biggest tech corporations have the skill and resources to write something like Flame and Stuxnet, a single gifted individual could very feasible repurpose it to do something the original programmers never intended. Like disabling critical safety mechanisms of places like power stations and causing things to overhead/over-pressurize/over-rev and ultimately fail, often violently (read explosively or burst into flames); they could also release toxic chemicals or crash passenger trains or open the sluices on dams and flood entire cities.
The world is hopelessly, laughably unprepared for the kinds of damage and destruction something like Stuxnet and flame might cause, especially if guided by fanatics or idiots who do not fully comprehend the consequences of their actions, or simply doesn't care.
America and Israel has let the genie out of the bottle by releasing Flame and Stuxnet into the WWW. Internet security firms have already 'captured' and isolated examples of both viruses in ways that means the automatic self destruct command built in cannot be remotely activated, and they are probing and studying those viruses, and they will not be the only ones to have done that.
Not only does the release of such sophisticated viruses make it possible for potential copy-cat viruses to be written based on the coding, it is also entirely possible others might just re-program the virus to do something else.
I seriously doubt the Russians or Chinese would believe the CIA had absolutely no involvement if critical infrastructure in Russia and/or China started to be disabled/destroyed by Flame or Stuxnet even if the CIA actually was innocent and it was just some hacker who figured out how to tell those viruses to go target other things. That opens the door to some unaffiliated party triggering a cyber total war between the world's top powers that might easily spill out into the real world.