I couldn't google up any examples, but if you read the fine print of contests given by large organizations, the fine print always includes a clause to the effect of "If you'd like to know the full list of winners of this contest, send a self-addressed stamped envelope to $ADDRESS and you'll receive it by XXX date." I would imagine that clause is to block exactly this attack.
Contest law is fairly well-hammered out, and surprisingly subtle; a few months back HN had a story about the legal dangers of doing a contest like this. If this story is accurate, it seems very likely GamePro is in violation of the law, if they are a US company. I don't know for sure as I am neither lawyer nor totally aware of the contest in question, but it's very easy to be in violation of these laws.
Contest law is fairly well-hammered out, and surprisingly subtle; a few months back HN had a story about the legal dangers of doing a contest like this. If this story is accurate, it seems very likely GamePro is in violation of the law, if they are a US company. I don't know for sure as I am neither lawyer nor totally aware of the contest in question, but it's very easy to be in violation of these laws.