A libertarian would value those things highly and the perceived benefit would likely outweigh the cost, even factoring in the proposed eventual free rider problem.
And that is exactly the reason why the libertarian view does not achieve the optimal results of the market.
The socially beneficial allocation of resource is to pick the consumption of the resource of the society to maximize the :
net Benefit = Total Benefits - Total Cost. -------------------(1)
Solving this equation, one will find that this occurs at the same point as when Demand = Supply. It can also be found by taking the first derivative of this and setting that = 0, the solution colloquially known as Marginal Benefit = Marginal Cost. This is why from Chapters 1-5 of a micro economics text book, the market allocates resources efficiently. Mathematically proven.
Total Benefits = Total Private Individual Benefits + Total Social Benefits and externals ----(2)
Total Cost =Total Private Cost + total Social Costs + externals ----------------(3)
However, the problem is getting the first equation in the first place. If individuals are left to make the decision them selves, then only private benefit vs private cost is considered. Therefore the equation that is being maximized by society is:
Benefit = Total Private Benefits - Total Private Cost ------ (4) Libertarains maximizing this
Because equation (1) and (4) are different in general and more so when social benefits and costs are not negligible , and (1) is the equation that leads to efficient allocation of resource by the market, equation (4) is the incorrect policy decision.