So I've been reading Menger's lectures to the Crown Prince of Austria (pretty good crash course in economics, also gives historical context for that era) and he rises a few crucial points in the function of the state (lecture VII, starts at page 121). The gist is that the actions of one person due to shortsighted economic interest cause irreparable damage to others; cutting forests and causing flooding in the lower lands. But the thing is, it's not the action itself that caused damage (e.g. like a theft) but the result thereof.
Does the NAP apply here? Does it cover indirect damage that could otherwise be preventable? Because if we're going by the logic that is proposed by some libertarians - that the mere threat of damage like that of someone considering Communism is worthy of being justifiably expunged - then shouldn't the potentiality of such danger call for the arrest of the private property owner, as in, if he began just talking or suggesting doing it, or even begun but took down only one tree?
If the NAP is extendable, some ancaps may claim that if he caused damage he will be sued and other property owners will abstain from such actions in the future. But it will be irreparable damage, it could erase the livelihood of an entire population. Wouldn't in that case it'd be wiser to make preventative measures, like some laws under the threat of force like a government? Also from the text it is clear that it wasn't a one time happenstance, but recorded several times, so it's unlikely that after that one time it happens property owners would learn their lesson.
Please spare me that Menger had a conflict of interests when teaching, it is quite obvious he isn't an ancap and would support some form of government anyway.
Other than that, I'd like to know what exactly is the deal breaker for libertarians about anarcho-capitalism? What is the exact issue with it or why do you think it's utopian?