There are some really terrible questions on SO, e.g. questions with titles that aren't questions, questions with titles that provide almost no info, etc., but yet the SO moderators continue to shutdown what are the most popular questions. The site itself clearly indicates which questions people find most valuable and yet those questions are invariably not ones that we 'should' be asking. Why? When will this insanity stop?
UPDATE – I appreciate the hard work that the moderators do, and I'm aware of the recent 'good subjective' exception that might be made for certain types of questions, but I have been frustrated by the sheer number of badly titled, badly written questions that I regularly have to sift thru to find useful info. And to compound my frustration, I'll occasionally stumble across a truly useful question containing lots of wonderful info that has been closed. Maybe I'm complaining about problems that have been fixed or mitigated but it certainly feels like some questions are being dismissed out of hand despite, or maybe even because of, their popularity.
An example of what I think is a good question that was closed is Hidden Features of C#? [closed] – this question isn't listed as one of the highest voted c# questions; I think this question is one of the "practical, answerable questions based on actual problems that you face" where the 'problem' is along the lines of 'what else can I do with c#?'.
An examples of a bad question that I think was appropriately closed is What's your favorite "programmer" cartoon?.
[I did not intend to troll.]