Theymos should probably consider tweaking the algorithm slightly. 'Micro-transactions' or deals of small amounts probably shouldn't count for much if anything at all and certainly shouldn't be giving people a +1 or 'green' feedack because it just leads to users seeking out doing certain deals as cheaply as possible purely for the feedback. As for escrow deals, maybe neutral feedback would be more appropriate.
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.
I haven't looked into who he's added and for what, but people shouldn't really be added to DT just for doing one or two trades with them. People who have done this in the past have been removed from DT and rightly so. I think the feedbacks that person has left for others should carry just as much weight as the deals they have done with that person. If a person has only really left a few feedbacks then they're largely useless in the grand scheme of the network.
Plenty of people who deal in physical goods use either a PO box or a drop shipping address, both of which are used in the regular course of business by many and it is generally trivial to obtain either of these without disclosing you identity.
Some people in the collectibles section also often have coins shipped to a third party, sometimes with the intent of the third party forewarding the coin to them, other times it appears they are making a proxy and/or straw purchase. Often times it is unclear that both physical transfer ownership transfer occurs in sales. I have also occasionally seen coins won in an auction only to have the buyer pay for the coin, have the seller not ship the coin and immediately list the coin for sale as being shipped from the original seller.
PO boxes are usually very expensive (or at least they are here) and you need several forms of ID to prevent people using them for shenanigans. It wouldn't really be worth it just for the casual user, but if I
had to buy something from here though I certainly wouldn't get it shipped straight to me.