Well, to go even further off topic, look at it like this:

The two major candidates are Bill and Ben. You disagree with both of them, but find Ben marginally less objectionable. Now one of either Bill or Ben WILL, with absolute certainty, win the election. So, even though you might agree whole heartedly with the policies of candidate Bob, it would still make sense to vote for Ben, since Bob has no chance of winning, but your vote could help stop Bill winning.

You could argue that voting for your truly preferred candidate is never a waste, and I can certainly see that point of view. On the other hand, I suspect an awful lot of people who voted for Nader wished Gore had won in 2000.

Or, put another way, a blow job is more fun than having a testicle amputated, but if your choice is lose the gonad or die of testicular cancer, asking the nurse to go down on you will be very little help.

So what? They still bought it.