At first I was like, "Why is theymos automatically in my trusted list?" then I realized, "Duh, the adminstrator of the system is already implicitly trusted whenever trust is granted to anyone."
Still I think people may balk because they don't think of this.
It will not work otherwise, someone can register hundreds of sockpuppets and prop up his trust rating.
Or maybe we should just ask every trust rater to submit a proof of work before they rate, the more trustworthy you already are, the less proof of work you need to do.