A minor point: that decision on meta.mathoverflow.net barely involved the moderators at all. One said what he was inclined to do, but otherwise it was the MO community.
Sorry if we're still appearing hostile. We have a very focused target audience -- people doing mathematical research -- and in order to serve that community best we turn away questions at inappropriate levels (i.e. what should be 'standard material' of a mathematics undergraduate education at a good university). We try to do that politely, and offer suggestions of other places to try, but I know we don't always succeed.