Can't they just add a single straw of reality and say a center left RINO?
Come on a libertarian is going to vote Obama?
Oh, it's possible that such a creature could exist. libertarians are a rare enough breed, but I've found that many of them don't even know what they supposedly believe. They think it's cool to be on the outside, and they think they're all for liberty - I mean really, who self-identifies as anti-liberty? - but they don't understand what that entails. They sure as hell don't take the time to read Locke, and more often than not they don't even bother with Jefferson. They can't identify the fundamental difference between positive liberties and negative liberties, they can't explain why no government can provide for positive liberties without infringing upon negative liberties, and they can't explain under what circumstances, if any, they feel such infringement is permissable.
Such a "libertarian" calls himself such because he supports economic freedom, so that eliminates Democrat and Green as an option, and he supports social freedom, so that eliminates Republican as an option, and he sees that the libertarian philosophy supports both these things, so he goes with that. Seldom if ever does he think out his true feelings on these issues further than these sound bites - if he did he'd realize that either his support for personal freedom or (more likely) his support for economic freedom is not nearly as strong as what the libertarian label requires.
The creature described in the DUmp OP could very well exist (although he obviously doesn't, given that he was described at the DUmp). He'd be an asshat.