Not unless you're thinking about the long term. Look at it this way, what will scare the politicians into behaving correctly (i.e. Constitutionally) - someone who supports the Constitution who actually gets a lot of votes. If the Libertarians or the Constitution Party could start gaining more votes, maybe like Perot did in '92 with 19% of the vote, with a foundation to build on, I honestly think you'd start to see fear in Washington, DC. And then more people would consider voting for them if they perceive them as having a chance.
Look, Ron Paul got almost no mainstream coverage at all during this election cycle, and he still got well over a million votes in the primaries. I know several people who wanted to vote for him but told me directly "Well, the media never mentions him so he doesn't have a chance to win." That's sad, but it's the way a lot of people think. Anyway, if you could just have a "break through" election - which doesn't require a win, just a good showing, then you really could change people's minds. That's all I'm saying.