So I called them. The rep advised they can't do anything until the buyer actually does something like leave negative feedback. They also want the buyer to also send a picture (as I had originally requested, doh).
Hmm, I guess this may be another one of those call back until you get a rep that agrees with you. I'm not sure what eBay can do proactively since I've not had this situation before. What is the correct best case scenario an eBay rep would do? Pre-emptively block the user somehow? I guess I don't know. At this point he's still able to open a INAD which I'm not sure if the feedback extortion will counter... Can you tell I overthink these things?