OP, you might be on to something but this needs work.
Making philipma1957 look like an example of some sort of abuse is quite ridiculous I think. He trades a lot, many here know his real name and address, AFAIK he even does re-shipping escrow. Basically what you're saying is that he should not deal with people in his trust list, or discourage them from posting positive trust for him, or not add people he's dealt with to his list just because of that. I don't see how that would improve the DT, quite the contrary I think. Phil's personal score is largely irrelevant anyway.
Do we know the date of when someone gets added to a trust list? I guess those who download trust dumps regularly could figure this out. Maybe that needs to be accounted for.