Until there's a major shift in the zeitgeist, a vote for a third party is a vote wasted.
It's kind of a slippery slope though, isn't it? If everyone took your mentality (which may actually be correct here), then there would be no hope for the duality system ever breaking. You need to start somewhere, right?
There are the seriously awesome otakus and there are the seriously unhinged otakus. And everything inbetween. It's like Russian roulette seeing which type do you wake up beside. I'll take it!