Used to be that "not a real question" was one.  Now, it says something silly like "Unclear what is being asked", to which I immediately thought, "Oh, it's clear what they want.  But it both isn't a question, and will never see an answer because the way they declared what they want, and the final result will never see the light of day.

http://superuser.com/questions/612243/how-to-create-our-own-codec-for-a-media-player

Should I maybe have tagged it as low quality?  Or just downvoted it instead of flagging it as "Unclear what is being asked" (which used to be "not a question")