And not a major fashion faux pas? I really wonder if there's even a way to make them an actually valid choice.
Personally, I have a hard time seeing them as appropriate in any kind of situation, unless the wearer is a goth girl or practices the oldest profession.
Tonight I went to an event and my plus-one spoiled an otherwise perfect outfit - dark gray turtleneck sweater, skirt and boots with those much maligned fishnets. I didn't say anything but she must have noticed my asides glances because she mentioned she had dressed up in an hurry, as if to justify her crime against fashion. Now I have to go to bed with those horrible fishnets haunting me.