Many left and right wingers believe the twin contradictory myths that voting third party is a wasted vote or a malevolent vote (in the first case, because the third party candidate can never win, in the second, because they think votes for a third party candidate mean that the mainstream candidate with the opposite view has a better chance of winning). Being the type of political Catholic with no home whatsoever in the major political parties (for instance, one of my pro-life views is that the children of a rape should be allowed to live, something the GOP has just come out AGAINST), I often get the argument from one side or the other for voting for their favorite lizard.
But an interesting theological argument I've been presented with from Mark Shea is that voting isn't about who wins the election- It is instead about integrity, conscience, and my ability to live with myself. Which puts an entirely different spin on my answer to such people- and gives me reason behind my historical tendency to NOT vote for the major parties in Presidential elections.
I still don't know if I should throw my vote to Virgil Goode of The Constitutional Party, whose only down side seems to be a bad case of anti-Mexican Racism, or Jimmy McMillan of The Rent Is Too Damn High Party, who seems to be a bit of a moral relativist (in that he's against gay marriage but is ok with gay civil unions saying that "A man should be allowed to marry a shoe if he wants to"). But I'm damned sure I don't like Obama/Biden's drone war and war on Catholicism, and I'm equally skeptical of Romney/Ryan's flip flops on major moral issues depending on who they are giving a speech to.