You always have a responsibility to vote! Even here in Canada prominent community leaders take your attitude and it is sad.
Not voting is called voter apathy and says I'm happy with the status quo. You have a responsibility to spoil your vote.
In apartheid South Africa where the election districts were rigged whites were told by the passive liberal educators to spoil there vote as a form of protest. It wasn't untilled the apartheid government had overwhelming spoil voters did they hold a referendum, to compromise on principles and negotiate with terrorists.
Sounds like you've bought in to the propaganda of the politicians. When you participate in the democratic process you are only helping to legitimize it. As far as I'm concerned, only when a libertarian-leaning candidate has a chance of winning is it worth my while to vote. Otherwise, I agree with Doug Casey--it is my duty to not vote. (
http://www.caseyresearch.com/articles/doug-caseys-top-five-reasons-not-vote)
Agorism is a much more productive way to bring about change. From the Wikipedia article on Agorism:
Agorists generally oppose voting for political candidates and political reform. Instead, agorists stress the importance of alternative strategies rather than politics to achieve a free society. Agorists claim that we can achieve a free society more easily and sooner by employing such alternative methods such as education, direct action, alternative currencies, entrepreneurship, self sufficiency, and most importantly "counter-economics".
I am a flavor of librarian, I can't in good conscience vote for some one unless I agree 100% with them. To date it has just been me.
There is no more of a clear signal to politicians than a majority of voters choosing not to vote by spoiling the ballot. (Abstaining says voter apathy and that = keep doing what we're doing) so as long as we have a vote I will always spoil it. IMO Spoiling is a vote for Agorism and Abstaining is a vote saying I'll follow whoever wins.