No it isn't. Part of what constitutes a nation is land, and thus borders. This is not a difficult or esoteric concept.
One of the few major problems I have with the Libertarian Party is their refusal to acknowledge the meaning of national borders. Every nation on the planet defines their territory very specifically. If any peaceful person has the 'right' to ignore the borders of a sovereign nation, why have them? You are basically advocating a world government, if you take this idea to it's logical conclusion.