I could also see people using escrow services for receiving shipments, maybe?! Imagine this:

1. Patron wants an item delivered, doesn't want to reveal his identity or address to the seller or USPS. Creates a bounty for this item, offers some reward over the item price.

2. Arbiter takes the job. The Patron trusts this Arbiter as a known broker for physical deliveries, so the Patron is happy.

3. The job goes live. A Free Agent takes the job, buys the item, uses the Arbiter's address as the shipping destination. Maybe this is a "questionable item" and this Free Agent happens to have really good anonymous payment systems set up. and The Arbiter has some kind of complex drop-box situation, I dunno.

4. When the goods arrive with the Arbiter, he confirms everything is to the Patron's request, disperses the "reward" funds to the Free Agent, and arranges with the Patron to get the goods to him. The Arbiter gets his pre-arranged fee for providing this service, as usual.

The Patron only has to reveal his physical address to the Arbiter, and since he's a highly-trusted node for this kind of thing, he figures the risk is worth the reward.