Mechanically, yes, but so long as you pay the taxes on that plot, it legally belongs to you, so you can petition local law enforcement to help you.
The caveat is that it also depends on local laws, which can be player defined. Some domains may simply be a free for all. I think Fortuna on Luna was promoted like that at one point, as a sort of frontier experience, though I don't know if it still is or any others are offering the same kind of thing. The point is, quasi lawlessness is theoretically possible.
p.s. It's worth noting that nothing is finalized at this point. A lot of the game mechanics may change as development progresses and testing ensues. But CoE is intended to be an open world with no safe zones, so the use of force can be applied anywhere in the world. It's very possible though that this will change. Stay tuned.
