I think it's fortunate that are economic position is so strong, because unfortunately our philosophic position is very weak. Much weaker that we wish it were. (...) We like to say that you cannot trespass a person's land without his permission however small the trespass is. That should be up to him to decide whether you're injuring him, not up to you. Every time I light a match fotons from that match are trespassing on property four hundred miles around. Every time I light a match a little bits of sulfur are trespassing on land twenty miles around. And therefore if we really took seriously sort of a lot of a simple aprioristic arguments we sometimes like to make in order to proof things we do believe to be true. If we took those things seriously, we would conclude that you couldn't light a match without permission from every land owner within site.

David Friedman "Ethics vs. Economics"