Good response. I do think the biggest problem at the moment is the algorithm. You know what would be really funny is if there was a captcha generated from content actually in the article and you had to answer the captcha to vote. :P
I know that wouldn't go over too well and would add a barrier that would discourage more people from voting, so let's NOT do that. Yet I do think it is amusing and it does show I was thinking a bit outside of the box.