This is the point @kleiner352 was making that you dismissed though... If the libertarians ever had a REAL shot at the highest office, they would become part of one side versus the other. They aren't, so the sideline sniping is a little wearisome. When it comes down to who holds power, it's always a struggle between two parties, and partisan affiliation, be it imagined or projected or whatever, is inevitable in that real-world situation.
For now, the libertarians enjoy the "fuck you all!" stance.