Vader,
We live under a 'soft' tyranny now. The enclave concept is one means of pushing back against it. In effect we are already at war. If and when things go hot it will become a far different game. They can't hit all the enclaves at once. And, once the first enclave is carpet bombed it will be the signal for everyone to implement the S.A.D. plan.

In the mean time establishing areas of self sufficient people who have no dependency on the government or the outside worlds infrastructure is much needed. It's hard for a tyrannical government to coerce folks who have no need of anything 'those people' have to offer. Nor is it as easy to blackmail folks who can fend for themselves, those who don't depend on any gov. aid or subsidy.