One of the posts that has generated the most comment here was my posting of an article by Ben Giliberti from the Washington Post who recently went out on a limb and suggested that restaurants who serve customers spoiled wine should replace the spoiled bottle AND not charge the customer for that wine. It turns out that Ben got quite a few comments himself and has posted a follow up article here.
One of the interesting points that Ben brings up in defense of his argument is that most distributors replace spoiled wine for free to the restaurant, meaning that in charging you for the replacement bottle of wine, they can actually come out ahead in the bargain.