Don't get me wrong, I think that the nomad/minimalist lifestyle is very rich.
And I agree with you saying:

the world could host a large amount of them without the system noticing.

As long as this amount is divided / not regrouped.

But maybe I should rephrase myself with an example.

Let take 300 nice humans.
They are nice, understand natural law, got free of the system, understand the need to regroup, act upon, build a nice community of enlightened minimalist people growing their independence.
And by regrouping in the matter, they got attention of the keepers of the human farm, witch will try, by any means not threatening there business, to destroy this very unproductive initiative.

So how do this 300 dudes could resist, without enough weapons, people, money (or any other energy equivalent) ?