You are talking about forming your own micronation and as other similar experiments have shown before, this is bound to fail, if you want to be free and lay low I cannot think of a worst way to do it than this, by doing this you will immediately become a target of every single country of the world, after all forming a country is not something that happens in such arbitrary fashion, and even if you think you got all your bases covered and you think you can do it there is nothing stopping the governments to change those same laws and regulations to give themselves permission to appropriate any land you happen to bring to the surface.
All other attempts were inside the territorial waters of another nation. The most prominent example was probably Minerva Atolls and Tonga. This is dissimilar to that right from the get go. It is 600 miles away from the next closest EEZ. Laying low is not being free it is simply hiding. That is the life of a rat and they will come for you eventually with the full power of the intelligence community and military when the time comes. The narrative within a country is a lot different than if one is outside said country. To me, the worst thing to do is to "lay low" in a western country.