I've mentioned this in one of the T-shirt comment sections. I don't understand how and why people use other people's/company's brand/ident/character/logo/anything. I thought the whole point of somewhere like this was to create and produce great and interesting T-shirts with original designs. The voting system can't work in the same way if someone uses an already popular piece of imagery.
A common example is Nintendo/Mario designs. Millions of people love it, but surely Nintendo own it!
Don't get me wrong, I'm all for manipulations to some degree. Juxtaposition of known imagery to create a new and/or original idea is a great thing. I just believe that it's easy votes to a quick sell to slap on something popular that you don't have any rights to. A false victory... where nobody wins.