A way to fix the downvotes/haters/cheaters
I'd like to suggest a system to help to keep the voting fair for designs.
If you're going to give a shirt anything under a 3 (a 1 or 2) you need to either (now this is where there might be a couple options)
1) Have to choose from 4-5 reasons (hard to understand, poor font choices, poor color choices, overall poor artwork, unoriginal idea, etc.) By picking reasons, the staff can see what those choices are and override them if needed.
2) Actually have to write up what you think is wrong with the design.
Basically, you can't vote 1 or 2 unless you give reasons. Only then will the 1 or 2 button light up.
I bet people have asked for something like this in the past. I haven't been very active on Threadless until recently, so I'm sorry if this is a redundant idea. :D