Mish says so, here:
"I voted for Libertarian candidate Gary Johnson and I am proud of my vote. Can those voting for the lesser of two evils say the same thing?"
Russell Kirk didn't call libertarians chirping sectaries for nothing. They have their very vocal advocates like Mish, Ron Paul, and Rand Paul, but no following of real consequence. As fringe candidates they view themselves as troublemakers mostly, fanatical idealists at war with reality whose only hope is to act as spoilers. Gary Johnson said as much of himself, here, as recently as August:
“I hope that I would get labeled as a ‘spoiler’ from the standpoint of people actually focusing on what it is I am saying, and that this changes the way whoever wins governs,” Johnson told Sunshine State News in an exclusive interview Saturday at the 2012 Ron Paul Festival.
Libertarians often claim they are "principled" in contrast to the rest of us. Evidently deliberately ruining someone else's chances is one of those principles, which vindictiveness is one reason they don't make progress as a party. While their extremism may scare people off, I think their natural lack of good will has more to do with it.
It's bad form, old boy.
