The only horror stories I can remember are that Mimi's coffee in Portland (?) and the Japanese new year. I've heard other second- and third-hand reports with no names or specifics. The "merchant horror stories" don't pass the sniff test for me - it seems like the same one or two brought up over and over again. It just seems like a fake news trend.
Andrew Mason said at startup school that the merchant satisfaction numbers are something like 95%. I