This has nothing to do with refining the art of human rationality, worse it's a political issue, which are well known to be hard to discuss rationally. Just because you've used the word "rational" in the title, doesn't mean that this post belongs on this site. If you had discussed the biases or logical fallacies that lead to people irrationally voting your post would have been worthwhile.
Sorry for being so scathing, maybe non-rationality related posts should be allowed in the discussion sectioned (personally I believe that they should not), I guess I'm particularly irked because political discussions tend to go downhill so fast.
In case I'm wrong and the community does want this discussion, I shall post a link to a rather nice analysis of when to vote: http://gowers.wordpress.com/2010/05/03/is-the-british-voting-system-fair/
Shouldn't rational websites try to improve themselves with regard to rational discussion of political issues?
Today is the midterm elections in the United States, and I am not voting.
For the vast majority of elections, voting is irrational, because the individual's vote is proportionately very small. This means it cannot have an effect on the outcome.
There are, however, conditions which can lead to voting becoming rational, and these are: