I thought I remembered just clicking on it! I figured that because it requires your GAF username that's the form of fraud protection.
First off, lurkers can pretend to be us, as there's no verification. Which kind of muddies the waters. Second off, Fraudwil is a busy man, who makes these threads last moment, and doesn't really have time to double check that the names of those who voted are all people who've posted in the thread at some point or another.