Voting for SNP or even De Linke is very different from voting for Ralph Nader in the US or for a splinter party in most of Spain.  I'm not against that at all. In fact, even in the US, there are places where third parties can and are effective. New York's Working Family Party is quite interesting. If you have a third party that is in position to win seats - why not?  My point was that the "plague on both houses" argument in favor of either sitting it out or voting symbolically, is a common argument. No Les Votes reads a lot like Michael Moore. I don't think it's a coincidence.