I always laugh (cry) when libertarian talk about how private land ownership is good for the environment because as soon as the duck lands on their property they can shoot it, causing them to go extinct. It was only game laws that applied to both public and private lands did the wildlife like the bison and rocky mountain elk rebound.
Where the fuck did you hear this? If someone is saying that kind of crap and calling themselves Libertarian they aren't Libertarian, one thing that pisses me off is when psychopaths or religious psychopaths hijack political ideologies and attention focuses on them and not what the ideology actually stands for.
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Just listen to what they say. Look at Ron Paul,
"Do you think it should be illegal to emit harmful pollutants?
You should be held responsible in a court of law and you should be able to be closed down if you’re damaging your neighbor’s property in any way whatsoever.
Who would set the law about what pollutants could and couldn’t be emitted? Congress?
Not under my presidency — the Congress wouldn’t do it. The people who claim damage would have to say, look, I’m sitting here, and these poisons are coming over, and I can prove it, and I want it stopped, and I want compensation." - Ron Paul interview
http://grist.org/article/paul1/=======
Basically he says you can emit whatever you want, and if you get lung cancer you can sue them. Even if you lived next door how can you prove you got the lung cancer from the plant or your smoking habits. What about a mile a way. Would it not make better sense to put limits on pollution as it leaves the property? What if you put the property in the name of someone 70 years old, thus if they get sued, you can delay it up in the courts and when they die nobody is left to sue.
Now for Rothbard (1992),
"Another serendipity out of this process would be a massive privatization of the socialized land of the western United States and of the rest of America as well. This combination of repudiation and privatization would go a long way to reducing the tax burden, establishing fiscal soundness, and desocializing the United States."
http://mises.org/library/repudiating-national-debtBasically he is saying he wants to sell off the national forests, blm land, and sell everything to private land owners at high bid.