Most of us adults accept responsibility for our own behavior because we don't have masters to explain to us what is proper and improper. If you're all grown up, you should know how to behave yourself and not accept being talked down to because you had an evening of relaxation and/or amusement. Life's too short for this nonsense.
Right. I think there ought to be common sense involved when a person has a party--not a "gathering", what is this, an alien abduction? "Gathering"?
Anyway, the main thing for such a person would be, not being responsible for the behavior of fellow adults as if they're to be policemen--oh, we would need that for the "cleanest people on earth"?--but to make sure that wherever you're having the party is a safe enough place for all invited. Nobody wants strangers crashing the party or for minors to get alcohol (if it's illegal for minors to drink where you live). Or for so many people to be there that your deck can't hold them all and there's an accident. Or your electrical setup is overloaded by sound systems and a fire starts.
But as for the other stuff, you can't make adults who want to do something stop doing it, and you can't watch everyone every second. But really, should we expect the Society to take responsibility even for the stuff they tell JWs to do? Of course not. Why would we? Even when you're expected to die for their teachings, it's still "your personal decision". Right? And they assume no responsibility for the consequences of that. So they're not going to assume responsibility for anything else.
That said, this may evidently mean that that young brother and sister who met at the convention and went back and hooked up at a hotel room were acting alone, and solely responsible. The Governing Body cannot be approached by local elders for a judicial committee for hosting the occasion where the young man and woman met.
We appreciate your inquiry and hope this clears the matter up for you.
Warm Christian Love,
sd-7