I don't understand why there aren't more Obama votes. If you're in a state where your vote could potentially tip it from Romney to Obama, wouldn't you want to vote for the outcome that provides the soonest opportunity to elect a pro-liberty president? If Romney is elected, that won't be until 2020 at the earliest, and that's only if his VP is not popular with the sheep. If Romney made a politically astute choice for VP, we might not have another opportunity until 2028. On the other hand, if Obama is re-elected, there is hope for 2016.
If you don't live in a swing state, meaning your vote serves no purpose other than sending a message, then of course, write in Ron Paul.