Interestingly, the people on DefaultTrust do not. Because they are enjoying the undue advantage. If u are really trustworthy, then trust system would work great for you even without DefaultTrust, e.g. this guy =>
https://bitcointalk.org/index.php?action=trust;u=143551. DefaultTrust is simply babysitting certain individuals as trustworthy.
No, it would
only work for people like that, who have no 'enemy'. No one has incentive to give that guy negative trust, he hurt no one and did an amazing job.
However, try exposing GAWminer, or BFL once upon a time, and see what happens to your trust rating when one of the Josh's begins paying for negative feedback for any critics.