I have a sense of humor with my birds and their antics. and on occasion, my mild mannered approach has given some positive reinforcement when i really should have discouraged the behavior. So i see where you are coming from. I inappropriately found it hysterical to see my 120lb son running for his life from my 2lb macaw! But ya know, all we can do is move forward. I personally would send 'em packing friend or no friend. But then that's me. Its really easy to say this when its not me putting a whole family on the street for one disobedient child. I have no advice for you because you are stuck between a rock and a hard place. I offer sympathy both with the situation with the child and the tendency to laugh when we probably shouldnt.