Seasteading is the concept of homesteading the sea, for example building an artificial island in international waters to establish a tax havenmicronation. While many theoretical structures and concepts have been put forth, to date the vast majority of functional existing sea-steads are based on ocean going sailboats. Broadly defined, homesteading is a lifestyle of simple, agrarian self-sufficiency. ... For the three letter acronym, see SEA. For the ancient Jewish unit of volume, see Seah (unit). ... Before Mexico City, Tenochtitlan was an artificial island of 250,000 (Dr Atl) Dejima, not allowed direct contact with nearby Nagasaki Formoza (Gdynia) The World in Dubai An artificial island is an island that has been formed by human, rather than natural means. ... The terms international waters or trans-boundary waters apply where any of the following types of bodies of water (or their drainage basins) transcend international boundaries: oceans, large marine ecosystems, enclosed or semi-enclosed regional seas and estuaries, rivers, lakes, groundwater systems (aquifers), and wetlands [1]. Oceans and seas, waters... A tax haven is a place where certain taxes are levied at a low rate or not at all. ... This article is about entities that are not officially recognised by world governments or major international organisations. ...
The fact that seasteads have the potential to be sovereign is a large part of their comparative advantage.
Seems to me that seasteaders are almost literally sitting ducks if they do anything that really pisses off existing nations and it also seems to me that seasteads would be magnets for many activities that would do just that.
Seasteads enable people to do all sort of activities, but that doesn’t mean they can’t choose which to allow on the basis of national security.