I don't think this is really a status thing, more a "don't be a dick to your guests" thing. Many people get cranky if they are hungry, and putting 30+ cranky people together in a room is going to be a recipe for unpleasantness.
But there is a difference between having an amount appropriate to avoid crankiness and more than can be eaten.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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