Feedback Extortion: no more threats from buyers.

Bottom line as advice to buyer facing a seller who isn't doing the right thing:
don't threaten to post neg.
do post neg.

In a near 180 degree change, the threat will now be interpreted as feedback extortion.

http://pages.ebay.com/help/policies/feedback-extortion.html

Examples of Feedback extortion

The buyer can't threaten to leave negative Feedback or low detailed seller ratings (DSRs) if the seller won't:
Accept a return and pay for return shipping.
Give a full or partial refund for an item.
Lower the shipping and handling costs.
Refund payment before the buyer ships the item back to the seller.
Send an extra item that wasn't part of the original listing. (This doesn't include when a buyer requests a replacement for an item that doesn't match the original item description.)