There is absolutely no way that Romney wins California. So a vote for Romney is a total waste of effort. I am not advocating that conservatives in Red or battleground states vote Green Party.
I am not saying that I am gladly voting for the Green Party, or that I am voting for them because I agree with anything they say. I'm certainly not going to vote for them because I have a love for Roseanne Barr.
We will all soon be harangued to vote for Romney, even though just a couple of months ago anyway suggesting a vote for Romney was either subjected to withering abuse or kicked off the site. The arguments for voting Romney will all be purely utilitarian. There will be no people (except the seriously delusional) advocating a principled reason for voting Romney. Since we're all limited this election cycle to voting pragmatically, then I choose to vote as pragmatically as possible.
If you live in a blue state, then you should vote Green Party. It's the least stupid, least crazy thing to do.
At least wait to see how things are breaking. If its a lost cause have some fun. But if there is some hope, consider helping eject Obama from the White House.