I've voted third party several times before. I have to vote my conscience. I can't worry that other people make bad choices, I have to do and vote for what I think is right.
It's kind of bizarre to me that people think you should only vote for the two major parties, ever.
Like, just because enough other people make bad choices to render my good choice irrelevant, I should just follow them then and also not make what I think is the best choice? That's silly.
I will always vote for who I think is the best candidate, not who I think is best out of who has a chance to win. I wish everyone felt that way.