Only one buyer ever left negative feedback on me, a nutter who sent me 10 emails complaining, despite the fact that I'd offered an immediate refund, when he didn't like the goods, even criticising the way I'd packed it. About a fortnight later I was travelling around the Country and realised that I was near his town, so I put his postcode in the TomTom and went and interviewed him on the subject, at 6' 3", he was staring at my navel and shaking with fear, not that I had any intention of physical violence: The posting was withdrawn a few days latet! - but personally I don't go by those postings at all.