Always, I order it so that I can send it back.

Rarely... a bottle will come out vinegar. Cork or other storage problem at some point during the bottle's life.

Personally, I've only had it happen once. They just brought another bottle of the same vintage, second was fine.

Similar to Voodoo. Despite the swirling, sniffing, feeling, tasting routine, I've only had one bad bottle. It was at a restaurant in Las Vegas many, many years ago. I was surprised, and the sommelier seemed quite surprised, when he checked, to learn I was right. Yes, I got a new bottle, which was just fine.

I've sent one back because it was skunky and brought 2 back to the store for the same reason. I've ordered wines I haven't enjoyed that much but assume it's my own fault, just like thinking the dinner I ordered would probably be good and ending up thinking "meh", not because it was prepared inexpertly, just because I didn't end up liking the flavours. It happens. But I don't make other people pay for my choices.

If a food (or wine) is BAD somehow, though, or brought to me in a way which I didn't order, I'll send it back - like anchovies on my salad when I specifically said none. And don't try to scrape it off, either, make me a new one.

Interesting poll, to me.