Hi dig,
but due process occurs within the orbit of the US constitution.
i am not sure there is a good precedent for US citizens operating in enmity to the state from lawless geographies.
are they more like people at war with the US or more like criminals?
for me, they may exist in a third category: enemy citizens operating beyond the scope of due process. not sure if this is a robust category. it's a working hypothesis.
i have a tentative solution to the problem.
miniature drones carrying injections capable of producing reversible paralysis. present the paralysed person to justice within a week and the reverse injection will be supplied.