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Hey, I don't think you're crazy or maybe not even wrong. But if you do vote for John McCain, then you have no standing to make fun of Nader voters.
Same if you write in Clinton.
The two party system is pretty rigged. You either vote with one of the big crowds or you risk getting the opposite of what you wanted rather than just something slightly askew.
You just happen to be feeling what third party folks have been feeling for a long long time. If you're going to vote a protest vote, try voting for Green Party or Peace and Freedom Party candidates. The results will probably be the same, but you'll have helped a third party have a bit more of a voice.