I'll definitely go down with the ship, because I feel it's the right thing to do. Hey, There was an election, one year, where both the "front-runners" were losing to a write-in candidate.
anyway, if its Diebold machines (doubtfully, where I live), I'd probably just bring along a label and write "Ron Paul; you stoned your last prophet America"...stick it on the machine and walk out.
it that's not the case, I'll definitely be writing Ron Paul's name in, no matter what happens.