Danny Finkelstein at Comment Central has a particularly superb post up about the scandal of the Caucuses. I say superb because I never really understand Caucuses until a few years ago when a Merkin friend explained them to me and I was left with the same sort of shock that is sort of within Danny's post.
Don't get me wrong, no democratic system of voting is exactly perfect, but the Caucuses really are the most absurd and anti-democratic process you could ever have. I remember my friend explaining how votes were counted on the basis of people standing in particular corners of the room dependent on candidate and how there would then be an hour where they could mingle and try to sway their friends and neighbours.
The result was that you could, quite literally, buy votes if you liked. People in corner A could try to convince people in corner B buy saying, "hey, come over for dinner next week" and suddenly votes moved. The fact that it was just activists anyway made a mockery of the system when compared to the Open Primary system which is far more democratic (but not without problems).
Have a full read of the post here.