It ain't your job to educate me, but if I can ask anyways, why would one opt to not vote out of principle? I went n' looked it up, yet the only mention of it being a conscious decision are spotty, single sentences. Everything else seems to focus on the socioeconomic difficulties people can experience.
To me, it would seem that voting for a non-mainstream party would be optimal if you don't trust the two-party system, wouldn't it?
I also offer the word in other flavors, like Droan.