I don't demand any sort of levy from them. They're on my property, and they need to leave. If they don't, I'll have to forcibly remove them. Nothing about libertarianism or anarcho-capitalism prevents me from using defensive force. If my property, or safety are harmed/infringed upon, then I have the right to defend myself and property.
So how do you handle the problem of someone acquiring so much land that this person can effectively control anyone who lives on his land (and basically form his own dictatorship, because he owns the best land)? Honest question.
What interests me about that is particularly the Lockean proviso - i.e. Homesteading is awesome when there's enough land for everyone to be able to do that. This is not the case though, and your taking some land as your own does deprive others of the use of that land, because it is a finite resource.
