@xj9 if you wanna be ancap - you might enjoy living in a boat. firstly, the bounds of property is very clear - I own this boat you own that boat. I can pretty much do as I please. There is far more scope for getting yourself into trouble than there is for fucking up other people's shit (contrast this with driving on the roads, anyway, the state mostly builds the roads so that's not anarchy) Often, other people will help you get out of a sticky situation, but no one is really obliged to do that, however, they have probably been in a similar situation before. There are different layers where the social relations have very different modes. Between vessels it's extremely volentary free association, but within a vessel you need a high degree of consensus. The traditional way of governing a vessel is basically a Benevolent Dictatorship, however the captain needs to sleep some times so there should really be at least one other person aboard qualified to lead.
Space Anarchy would be a lot like this I think. The life support system is a natural unit of sovereignty - am you really gonna be happy if people within your airlock are carrying shooting weapons? There is a very strong mutual benefit to not getting any leaks! so I think life within one space colony will be extremely mutalistic (ansyn) but relations between space colonies can be as ancap as you like.