I don't understand the check-my-proof tag (added here). It seems to be about the form of the question, rather than the topic. It doesn't work as the sole tag on a question, and it is fairly subjective (how detailed does a proof idea in a question have to be to earn the tag?) — the criteria for a meta tag. I can't think of a use subscribing to it, ignoring it or searching for it. What good is this tag?