Then dont run it, thats simple.
I did it the first time and then maybe a few more to help a friend.
From the beginning, the time invested its no worth it. You just discovered it recently.
However there will always be people who think is worth it and continue doing it. So the new characters wont be alone.
The only problem would be new people cant continue the main quest anymore, but that isnt gonna happen in a close future.
So this thread is useless.