Naval blocades are a far better defence than mere chain link and that's all it would take to keep things secure. There seems to be some confusion about the difference here between anarchy and democracy. Democracy is not a device that you use to get what you want. It is a mechanism that is supposed to help us to make social decisions without fist-fights being part of the deciding process. Democracy is not what you get from riots.
Anarchy is about ruined families , lost lives and economic ruin.
The biggest danger that we may face as globalisation organisers move to a secure island is that the rioters will still just as mad as they are , plus whatever RPM they gain from being thwarted by destroyers. At that point they'll have nobody to fight with but us. Fear doesn't seem to be a big part of the picture with these folks. They aren't creating democracy here. They're setting us up with a country that has guys with submachine guns stationed on the roof of our government buildings.