i know im still new and all, but i think there is a lot to consider before leaving neg feedback, i mean, does the other person even know you were not satisfied? Was every avenue explored to result in 2 satisfied parties? I mean, 1 neg feedback could def impact someones credit around here drastically. Is there no possible way both parties could leave the transaction happy? Those are all questions you have to ask yourself before leaving neg feedback. I've been on other forums where people just bash and post how unhappy they were and it is usually sorted out between the two parties in the end, all the public drama could have been avoided by just communicating with the other person. I think that if you did not exhaust every option to resolve the discrepancy, then you shouldn't leave negative feedback. (i don't think i have to say there are going to be some clear, cut & dry scenarios) All-in-all i think only after careful consideration, should negative feedback be left for another member.
P.s. i wonder if there is a way to have mods approve neg feedback to prevent unnecessary neg feedback from being left for another person.... Just a thought..