Earlier quoted context omitted.
So then that is not voluntarily association. Because presumably, you would be kicking people off of roads, using force, if they refuse to pay the roads tax. That's using force.
It's not a "road tax," if you don't choose to be a part of society, you can't be a part of the society. You are free to leave. The concept of "kicking people out" implies that they have some natural right to be part of that society.
Thats still force, though.
You are just saying that the force is justified. But thats still force to physically prevent someone to have access to those roads.
It is force, in that you are physically, using a threat of violence against someone else, because you don't want them using your road.
I am not saying that this is morally wrong, or anything. I support the justified used of government force against others. But lets not pretend that this isn't force/violence.
> you can't be a part of the society.
It is not that they "can't". Instead, it is that other people will use violence/force against them, in order to prevent them from being a part of society. That is force. that is violence.
You can make the argument that the violence is justified. Which is fine. I absolutely believe that violence and government force can be justified. But justified force is still force!
> You are free to leave.
And if they refuse to leave? What are you going to doing about it? Answer: you will probably use force against them (although you may believe the violence is justified, justified violence is still violence!).