If for some reason your asked to leave a restaraunt for your carry preference or ineptitude at descretion, say at end of meal. Are you legally obligated to still pay? Is it against the law to just get up and leave? I would say common sense says they'll expect this,but could a real bugger of a manager have you arrested? Now how about if they ask the guy one table over, is it same to join them in leaving without paying,seeing as you just lost your appetite?