If you make decisions in an emerging system you have to take the small into account. You can't model each individual and put the idealized system into a computer because it would take years to make a decision. Nor can you try to mentally add up the interactions.
What you can do is to paint the system with a broad brush, and leave wide sidewalks, as I was saying. Jane Jacobs. Even anti-planning, that is, allowing the system to self-organize. We are back to the few and simple rules of the game and a friendly environment that marked the emergent systems.
Don't do what our governments are doing with Wikileaks, don't cut sidewalks because you will send a message of panic to people; people who will stop believing in the security offered by that system. People who will become disoriented and generate conflict. People for whom Julian Assange will be a martyr of the Struggle for Freedom, people who will tumbarán the Swiss bank's website that collected donations for Wikileaks for example.