To eliminate bias, I think all contestants will have to submit their pictures without their name in the file-name. I guess we didn't see this problem coming.
on the contrary, i did see this particular problem while creating the polls. And i have changed the file names of some of the pictures, but that was because the poll system wouldn't let me have more then a 100 characters in the link. But since most brackets only have 4 people, and they're all moving on, it doesn't really matter whether you guys know who submitted what. Changing it just meant more unnecessary work for me, and im lazy.