ned i can't seem make a comment on your post? no fields at bottom?
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drop catchers should protect themselves, nf and ds is a ok system for me, as david said the rules were probably writen prior to drops.
i can see how you fix one problem then create a new one.
my opinion is use nf's policy, winner gets a period of time to pay , if not it should go into "trust" and get handed to auda to make a decision, i can't see this happening daily so to put that in place would be a deteraint.
the usa system where it goes back into auction and the bids get put back in i like as well.
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i had a problem with a ecom florist and dodgy orders to "leave at front door", ( guessing cvv numbers ) i put in a script that before ordering told the visited their IP address and the problem went away totally.
tim