Warning feedback blackmail.

There are some sellers on ebay using dubious tactics to prevent their feedback rating decreasing and it appears that ebay cannot do anything about it.I recently left neutral feedback for a seller. I could have left negative as the item was faulty and they have strict conditions about packaging and returns. However I left neutral and more importantly, factual feedback, simply stating the item developed a fault.In return the seller left unpleasant and aggressive negative feedback for me. At the same time he then filed a "mutual request to withdraw" feedback form. Looking back through his feedback it becomes apparent that this is a tactic he has used several times. He said in an equally aggressive email that yes he used it to get a withdrawal to keep his rating unchanged.In this situation I would advise you to accept the negative feedback, leaving a follow up comment trusting in the ebay community that the rest of yours and his feedback speaks for itself. Dont let bullying tactics from unreasonable sellers win the day.