Unfortunately this isn't confined to Lunacon or even the US, having observed at least some* of the list at UK conventions. Two years ago, a friend of mine had someone sectioned under the Mental Health Act for their behaviour at a con.
*actually, now I come to think about it, large swathes of the list.
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Date: 2009-03-25 09:08 am (UTC)*actually, now I come to think about it, large swathes of the list.