If U is in bankruptcy restructuring (Ch. 11) could they make an argument that their hiring practices at PHL over the past decade is an insurmountable obstacle that requires mass firings or closure of the hub simply to get rid of the dysfunction? Even if the the 'sick calls' were not the proximate cause of all the fiasco this weekend, surely, it's an intolerable break down of integrity.... especially when you know that folks that were gold-bricking had the opportunity to realize that they were not just carelessly, thoughtlessly taking a break, but were actively contributing to the ruination of passengers' holidays and to the active disrespect of their co-workers and, presumably, friends.