In Libertopia, the only regulations are contract enforcements.

It's a lot like cryptocurrency and DAO schemes: it turns out to be really really hard to get people to accept that a bug in the law means a bad outcome for them, and nobody writes non-trivial bug-free code.

In places more enlightened about gun ownership, self-regulation can just happen at the point of a gun, with no need for the middlemen.

> In Libertopia, the only regulations are contract enforcements.

That's disingenuous. There is plenty of libertarian literature on negative externalities. Milton Friedman, notably, was happy to use taxes and regulations to protect the environment.

The reasoning is simple: by polluting my land / poisoning me with PFAS, you have violated the NAP. This kind of pollution is illegal in "Libertopia".

I have polluted your land and poisoned you simply by driving past your window with my combustion engine on my neighboring property. That you draw the line at PFAS is completely arbitrary, which usually becomes clear when you ask libertarians what they believe constitutes an aggression.

Does every single Democrat agree about every minute detail of policy? Expecting unanimous consensus is an unfair bar you only apply to positions you already know you don't like.

The same can be said about your arbitrary argument. Why are the fine schedules set to $X today instead of $X+1? Why do we get drivers licenses at 16 instead of 17? Do you oppose Obamacare because it has such an arbitrary income limit?

Everything about the specific implementation of laws is arbitrary. The important thing is that it is reasonable, and on solid moral ground. A libertarian government would scale the fines / punishment / taxes in accordance with how grevious the crime was.

What is the basis for saying that the kind of pollution you describe is illegal in Libertopia, then? You say that it is, because of NAP. That's a simplistic answer which you now admit isn't necessarily true.

I am exactly not expecting unanimous consensus, which is why statements like "this kind of pollution is illegal in Libertopia [because of NAP]" seem dubious to me.

A fictitious government is always better than a real government for the purposes of argument.

There are no regulations in Libertarianville. If you are unfamiliar with their philosophy, they have this concept called the NAP(non-aggression principle).

The generally(this might be too strong a word to use with Libertarians) accepted interpretation of the NAP is that as long as I do not initiate violence against someone, my behavior is acceptable, and that violence is only acceptable against someone if they break the NAP first.

This breaks down in Libertarian communities as they cannot agree on common deductions of things like what counts as “someone”, what counts as “violence”, whether you have rights to the land if you’re not using it(Georgists/homesteaders), or if indirect damages like pollution are a violation of the NAP.

The idea that a libertarian community would let someone dump toxins into their neighborhood and leave without cleaning it up or compensating the hurt is completely plausible. Half of the community would not believe he directly caused the cancer unless he injected it into you, and you should have been more careful about what water you drink, and the other half’s only recourse would be to fight the first half.