Please don't!
Whether you vote for a liberal like Romney over an anti-American communist is your call, but please show up for the main attraction: vote for conservatives for the US House, the US Senate, your governor (if running), and your Secretary of State (again, if running). We need honest state governments to limit liberal vote fraud, and we need a conservative Congress to control the liberal in our White House regardless of who wins.
I agree don’t stay home....leave the President blank or put Mickey Mouse, but go to the polls and vote for the Senate and House and your locals. That is most important anyway.