Orphan Crow:
You may feel that Watchtower controls all aspects of their members lives, and that is your right to feel that way. But that is not how the law views it. officially sponsored events would include meetings, field service, bible studies, shepherding calls, construction projects, assemblies and conventions. It would also apply if the activity happened on Watchtower or Congregation property. There is also a theory on many states of master and agent relationship, where a master can be held responsible to the damages caused by their agent if the agent was acting in the interest of the master.
Let's take the example of the boy scouts. Those policies don't apply if a scout master wants to take out one of the boys to get ice cream and then does something to the boy. The perpetrator is the one responsible for the action that occurred not the boyscouts.