Of course they can.There's no such thing as a public resource. Even the air isn't a public resource.Why is it automatically public land if it has water on it? That's nonsensical - all land has water on it, if you dig deep enough. Around here, the water table is about six to eight feet below my garden. I own my land (by agreement I have with the nice people at the bank).
I've heard this argument before, that nothing really is public or shared.
Again, let me point out that it's the claim to water that is at question. I am not talking about water that falls on your well, or rain that seeps through the roof and drips into a bucket. We are talking about the notion that you can go to any part of the world and say, "well, this water is mine," without considering that the water could have belonged to an entire community. Has happened in history all the time, especially with land. People all of a sudden get the urge to knock something over or build something on top of an area that is used by a community, but that the community doesn't have any deed or document showing ownership. Happened all the time in Latin America, when all these fruit companies would go to places like Guatemala, Colombia, Ecuador would acquire land that was unused by the community to grow fruit, at the same time paying natives crap wages for their labor.
This notion of private goods, and the non-existence of public goods, is simply a Western thing.
Those too, but also air itself.As we do without food. That's not a right either. You'll find that if you are not indoors and not clothed, you'll not survive more than a handful of days - less than that on most of the planet - and clothing and housing are not a right either.
Things necessary to prolong our existence are not rights simply because they prolong our existence.
Then that means you have no right to a military, nor to a police force, nor any court/legal system that protects you from having your property seized. Of course you have a right to property, that is, if you can keep it from being seized from people while you're unable to get out of bed to work your land, because you're extremely ill, or because all you have is a shotgun, while the bandits have five well armed thieves with semis.
The libertarian, at this point (the way I see it), might want to argue that it is your fault for being sick or for living alone in your little ranch with one shotgun.
Except, this can all be avoided (to some extent of course) by building a society based on the notion that protection of property is PUBLIC, as is water, health, food, and yes, clothing and shelter too and thus providing it to everyone who is unable to hire a possee to protect one's land, or contract a good doctor that will treat you, etc.