Dog owners, in general, are careless when it comes to the general public.  A pet is loving, playful and friendly with its owners and family, but can be vicious towards strangers.  Especially in this situation where I believe the officer was yelling and acting aggressively.  Still, the family were in an unauthorized area with a pet tied to a coconut tree.  Security responded to this.  Poor judgement on the part of the family. If they simply waited in the truck while the husband retrieved her luggage, nothing would have happened.