As the topic title suggest, I think we need better quality control to screen entries. Some people are just spamming, posting the same design just to cover a lot of 'ground of display' in a page to catch attention - even covering the page one fold with the same entry. I am just throwing idea but I think a limit of how many entries you can post maybe for a day should be limited to somehow control this spam madness.
I think clients will also benefit to this, they won't have to browse all day with spam designs and this will give the DesignContest site even more quality reputation.