Part_Time_Civer
Warlord
But you're not.
States make the law. But states are represented by private actors. I'm not sure what your point is here.
The problem is rather with justice itself. Enforcing contracts is a legal matter. So unless you wish to replace the state by companies (that is, non-state owned enterprises), I don't quite see the point of it. Should the state then be allowed to wither away? And is that even a plausible scenario for the biggest economy on the planet?
I think the confusement here arises from the fact that we don't all use the same definition of libertarianism. While some (including -I think- you) define it as the total absence of a state, others (at least me) define it as a society with a very small state. Yes, there can (and should IMO) be laws against agression (broadly defined) else there can't be lawsuits (hard-nosed libertarians will not agree with me).
Regarding the subject of enforcing contracts, I believe individual actors can collaborate and sue others in an effective way (or negotiate legal settlements, like a group of bondholders of SNS bank are currently doing: http://www.nu.nl/economie/3526246/obligatiehouders-willen-schikking-sns.html).