How do you isolate a isolated country?
What do you get when you have nothing left to lose?
Seriously, if this was a big problem for the rest of the world, it would be handled with military force, but the truth is, so far the UN, and the rest of the world stand back and let this happen.
Of course the only real way to stop it in the short term, is to bomb the **** out of them. Go in and take as many of them out as possible, including the villages and towns where they live, and base out of. That would of course mean killing woman and children
, old and young, as well as combatants. And of course most have no stomach for this.
In the long run what those people need is education, clean water
and a sense of purpose. I suspect that what they are doing now provide them with many of these, hence the only way to stop them is to kill them.
If I was contemplating a cirmumnav at this point, I think I would give it up, or go the very long way around that area, which would not be to comfortable I suspect...
There are other places to go.
During WW2 one other thing the allies used that were very effective were the Q boats.
These were merchant ships that were heavily armed, and when the subs surfaced to use the deck
gun, where fired on by larger guns
on board armed vessels. Seems that would be a good way to go. Just hire blackwater or some other mercenary firm to do it, build 4 or 6 ships like that, filled with weapons, into harms way, and let the sea take them.
My guess is within 6 months to 2 years it would be over. At a far less cost. But then knowing blackwater they would screw it up.....