> hey let's go ahead and leave a negative feedback because there was a kink with the transaction? That's exactly what feedback on a per-transaction basis is fo

> hey let's go ahead and leave a negative feedback because there was a kink with the transaction? That's exactly what feedback on a per-transaction basis is for, isn't it? If a seller has a habit of sending things with underpaid postage, then a potential buyer will be able to see the pattern in the feedback history and choose not to buy. If it's a one-off, then a potential buyer will see that. The feedback history just represents fact. If, on the other hand, buyers do not post negative feedback for such incidents, then a a seller habitually sending items with underpaid postage will appear the same as a more reliable seller. This renders the feedback system useless in this kind of case. It also makes it hard to find reliable sellers, and encourages less reliable sellers to remain in the system.