David Friedman wrote the spectulative guide to anarcho-capitalism, Machinery of Freedom where as Patri Friedman, who was influenced by David's ideas, head the seasteading movement.
Interestingly enough, where as David Friedman, wrote in opposition to his father, the eminent economist Milton Friedman, Patri Friedman explictly implemented his father's ideas and expanded upon it.
Seasteading is far-out but Patri seems self-aware of that and has the wisdom to take an "I don't have all the answers yet" attitude where warranted.
From what I've seen of David's work (again: if this is any indication) it seems poorly thought-through (probably) or dishonest (possibly); a post-state anarchist society is going to be different, this stuff reads like epicycles-within-epicycles to convince you it'd be "the same but better".
Not editing so as to leave evidence of ignorance intact.